Hps Grow Lights

What Are HPS and MH Grow Lights? There are two main types of high-intensity discharge (HID) light: metal halide (MH) and high-pressure sodium (HPS). When the leaves, roots, and stems are still forming, the blue …

Hps Grow Lights

What Are HPS and MH Grow Lights?

Hps Grow Lights 3

There are two main types of high-intensity discharge (HID) light: metal halide (MH) and high-pressure sodium (HPS). When the leaves, roots, and stems are still forming, the blue spectrum produced by MH lights encourages vegetative growth. HPS lights are good for flowering because of their red/orange output.

Herbs and leafy greens may benefit from the usage of metal halide (MH) lamps. Enhanced-spectrum HPS grow lights are ideal for flowering plants.

Using both HPS and MH grow lights for a comprehensive HID lighting system is the best option. Depending on the stage of growth of your plants, you can swap out MH bulbs for HPS bulbs or the other way around.

Benefits of Using HPS Grow Lights

To put it another way, why should you choose an HPS grow light above any other type of grow light on the market today? These lights are the ideal option because of a number of advantages:

  • They Mimic Natural Light: Plants thrive when they are exposed to light at the right wavelengths and levels. When it comes to producing a spectrum that closely resembles the sun’s, HPS grow lights are the finest. A plant’s growth can be aided by the strength of a ballast, allowing it to receive more light than it would in the wild.
  • They’re Affordable: To begin with, HPS bulbs are among the most cost-effective options for grow lights, and they don’t come at the expense of quality. Additionally, if a component of your HPS light system malfunctions, you may easily and affordably repair it rather than purchasing an entirely new system.
  • They’re Powerful and Effective:HPS grow lights have a large potential for light production, which is one of the most important advantages. For example, a 1000w HPS bulb emits 130,000 lumens of light at 1150 PPFD, which is much more than other lighting sources. Therefore, a larger range of plants can be grown than with other grow lights.
  • They’re Adjustable:The ballasts in the majority of HPS lamps can be dimmed. Using this method, you can easily manage the amount of light your plants receive to ensure that they receive the right amount of light.
  • Flexibility: In order to provide the light that your plant and environment require, a wide range of reflector types are available to you. There’s an HPS grow lamp for every indoor garden and gardener, whether you need a lot of light for a lot of plants or a little light for a few.

Where Can HPS Grow Light Be Used?

Grow tents, huge grow rooms in residences, and greenhouses can all benefit from high-pressure sodium grow lights. Reflector fittings are purchased separately for use with HPS grow lights. You’ll also need to buy the correct ballast. The ANSI code of your HPS grow light must be found on the ballast you choose. You should search for a system with a ballast that can handle both MH and HPS bulbs if you plan on changing bulbs.

The Best HPS Grow Lights On The Market

600W HPS+MH Air Cool Hood Grow Light Kit

yield lab 600W HPS+MH Air Cool Hood Grow Light Kit

Regardless matter whether you’re a novice or a seasoned grower, this 600w light is an essential part of every grow room.

Growing six plants from seed to harvest will be a breeze with this light’s 90,000 brightness output, 5500k MH spectrum, and 2100k HPS spectrums. Its dimmable ballast may reduce intensity by up to 50% when plants are young and boost peak intensity by 10% towards harvest for a genuinely personalized experience.

A domed shape and air-cooled features allow this grow lamp to optimize intensity while decreasing heat over 16 square feet of canopy.

  • You can adjust the light’s intensity anywhere between 50% and 110%.
  • Remove heat from a grow room by connecting to exhaust fans.
  • Peak PAR: 900 (HPS), 602 (MH)
  • Peak Lumen Output: 90,000 (HPS), 61,000 (MH)
  • Covers 4-6 Plants

EyeHortilux Super HPS Spectrum Grow Bulb

EyeHortilux Super HPS Spectrum Grow Bulb

A fixture like EyeHortilux can last a long time. Up to 90,000 lumens per watt can be generated.

For grow light systems, this bulb is one of the best HPS bulbs available on the market. It is a spectrum bulb. This bulb has the ability to produce the deepest shade of red. Compared to other brands, it is more durable. Using it after the growing season is possible. Because it contains less mercury and is lead-free, your plants will benefit from it.


  • It is possible to use the bulbs for a long time.
  • They provide the most intense light.
  • Compared to other brands, these bulbs are more affordable.


The bulb is scratched when purchased. It’s important that you buy them from someone you can trust.

 iPower High Pressure Sodium Super HPS Grow Light Lamp

 iPower High Pressure Sodium Super HPS Grow Light Lamp

One of the greatest HPS bulbs for digital and magnetic reflectors is the 4-star grow bulb. It has a brightness of 1400 lumens with a color spectrum of 2100 red and orange. When it comes to flowering and fruiting, it has a lot of PAR. Hydroponics is the intended use for this bulb. With a high lumen output lasting up to 5,000 hours on a single charge, it consumes less power.


  • Grow lights like this one are long-lasting. There’s no limit to how long it can last.
  • When compared to other brands, the bulb’s lumen decay is very low.
  • A one-year warranty is included.
  • It’s less expensive than the competition.


  • Defective bulbs may be sold by some sellers. A trustworthy seller is the finest option.
  • Make sure your magnetic reflector is compatible with the bulb before using it.

Apollo Horticulture High Pressure Sodium HPS Grow Light

Apollo Horticulture High Pressure Sodium HPS Grow Light

One of the best HPS lights for electrical and magnetic ballast is Apollo Horticulture. Up to 140,000 lumens can be generated. This bulb promotes flower and fruit development. For hydroponic plant cultivation, it’s ideal. It’s capable of emitting light in the reddish-orange area of the spectrum up to 2000K. In addition to being extremely durable, it consumes very little power. It’s a 110V appliance.


  • Durability is good.
  • Has a reduced lumen loss.
  • It’s easier to get up and running.
  • Compared to other bulbs, this bulb uses less energy.


  • The warranty is only valid for three months after purchase.
  • A lot of heat is being emitted by it.

VIVOSUN Hydroponic HPS MH Grow Light Bulb

VIVOSUN Hydroponic HPS MH Grow Light Bulb

Using this 4-star HPS bulb, you may run it from 120 volts up to 240. Up to 250 watts can be muted to create 90,000 lumens. A ballast and a reflector are included in the package. The best German aluminum is used to craft the reflector. Lighting and ventilation are both controlled by a digital timer on the device.


  • Easily movable ballasts.
  • A digital ballast, a metal reflector, and a digital timer are included in the package.
  • With the help of a computerized timer, the pants’ ventilation and illumination may be controlled.
  • There is a three-year warranty on the ballast.
  • Reflectors are long-lasting.


  • When you adjust the brightness, the digital ballast shakes.
  • The vendor has a problem. Buying from a reliable seller is the best option.

Comparing LEDs and HPS Lighting for Cannabis

Hps Grow Lights vs led

It’s dangerous to draw conclusions based solely on generalizations about LEDs or HPS lamps. Apples and oranges are easy to compare with horticultural illumination. In the early days of LEDs, many growers reported poor results.

Depending on the product, LEDs have variable efficiency ratings, which has a significant impact on how much light they produce. HPS has the same problem. When discussing HPS in general, we tend to skim over details like the fixture’s wattage, the lamp’s single- or double-ended design, and the ballast’s magnetic or electrical nature, among other things.

For example, an HPS fixture with a 1000-watt electronic ballast and a double-ended lamp can produce an efficiency of 1.7 mol/joule. A 400-watt HPS lamp with a magnetic ballast, on the other hand, is a completely different matter. The 400-watt will only be able to achieve a 1.0-mol/joule efficiency rating. All we’re doing is using the term “HPS” when we’re referring to different technologies.

In general, LEDs are the same. With some clocking in at 2.8 mol/joule, certain LEDs are less efficient than high-quality HPS lights and produce a smaller amount of light. Depending on the type of diodes, color composition, and overall product quality, LED fixtures might differ in their efficiency. This is due to several engineering considerations. LED fixtures may not be able to give your plants the correct morphology even if they have a high mol/joule efficiency, as detailed below.

The ballasts of HID fixtures may also have hidden inefficiencies. It’s all too common for the mol/joule value on HPS products to refer to lamp efficiency rather than actual product efficiency. There’s no way to know how efficient a light bulb is until the ballast’s losses are taken into account, and that can make a big difference. An HPS fixture’s advertised efficiency is reduced by the reflector hood.

When it comes to efficiency, it’s not just about how much electricity you use. You’ll get superior harvest results if you use lighting products that have been well-designed. You should expect more secondary metabolites and larger, denser flowers when you give your plants a well-balanced, fine-tuned spectrum. As a result, the need of HVAC systems, circulating fans, and pest control is reduced as a result of the lower heat generated by electrical efficiency.

Related article:

HPS vs MH grow light spectrum differences

In the flowering phase of your plant’s life, the HPS has a red or orange hue to it. In the vegetative stage of plant life, MH bulbs use a more blue spectrum of light.

Hps And Mh Grow Area By Wattage

Choosing a high-intensity discharge (HID) lighting system begins with determining how much space you need to illuminate. You can choose from a variety of wattage schemes, including 1000, 600, and 400 watts. A 1000 watt system will cover a 5 by 5 ft area, a 600 watt system will cover a 4 x 4 ft area, and a 400 watt system would cover a 3.5 x 3.5 ft area

Choosing The Correct Ballast

In order for a HID bulb to provide a steady stream of light, it needs a ballast to regulate and mold the current into a smooth flow, so that the bulbs do not flicker or distort. For HID lighting, magnetic and digital ballasts are two options. Using hefty coils and condensers, a magnetic ballast is a tried-and-true technique that regulates power to the bulb In comparison to magnetic ballasts, digital ballasts use a considerably lighter circuit board to control the power at a much higher frequency. Lumen output can be increased by providing your bulb with a more steady supply of energy.

Another important feature of some digital ballasts is the ability to dim the power output from 100% to 75% to 50%. These days, most ballasts are equipped with a “super lumen” setting, which allows you to use your bulb to its full potential. Digital ballasts need the use of digital bulbs because of their high frequency. This means that magnetic ballast bulbs cannot be used in digital ballasts because of the possibility of bulb failure, and vice versa. The wattage of the ballast and bulb must also be equal in order for a system to work effectively. Magnetic ballasts, on the other hand, cannot operate both HPS and MH bulbs, but digital ballasts can.

HPS & MH Reflectors

In order to get the most out of HID bulbs, you’ll need a cover or reflector to direct the light where you want it. Reflectors come in a variety of shapes and sizes, including air-cooled, water-cooled, wing, and parabolic. There is a niche for each type of reflector. Larger reflectors are recommended for high-wattage HID systems in order to increase your growing area. A Sun System Magnum hood, for example, does well with a 1000-watt bulb. This information is crucial when selecting a reflector for a certain application. Reflectors come in a variety of shapes and sizes.

HID lighting produces a significant quantity of heat. As a result, when selecting a hood, ensure that it can handle the heat generated. An air or water cooled reflector can be used to achieve this goal, if desired.

In order to keep as much heat in the reflectors and ducting as possible, these hoods have sealed “windows” on the bottom and open ports on each side for ducting or hose connections. Temperatures drop significantly when cool air or water flows through the hood and is ventilated outside the growth area.

What is The Right Wattage for Your Garden?

If your garden is large, the wattage of your HPS bulb will need to be adjusted accordingly. In order to get the appropriate HPS bulb for your garden, you must measure your garden tent or greenhouse.

150 Watt HPS Bulbs

A ballast and reflector are often included in 150-watt HPS bulbs. The 150 watt HPS bulbs, unlike the other bulb wattage, don’t normally get hot. It is, however, the least efficient bulb size available. 1.5′ x 1.5′ or 0.45m x 0.45m can be illuminated by this bulb. Maintain at least a 6-inch distance between your plants and your canopy.

250 Watt HPS Bulbs

The reflector and ballast for 250 watt HPS bulbs are the same as those for 150 watt HPS lamps. Availability of 250 watt HPS bulbs in hardware and garden supply stores is quite limited. The 250 watt HPS lights are more efficient than the 150 watt bulbs in terms of heating up. If you want to save your plants from dying from overheating, you need hire a professional to install cooling equipment in your greenhouse.

The best HPS bulbs for 2.5′ x 2.5′ or 0.75m x 0.75m gardens are 250 watters. Plants should be spaced at least 10 inches (25 centimeters) apart from the roof’s canopy. Gardeners and greenhouse growers will appreciate this bulb’s high efficiency.

400 Watt HPS Bulbs

HPS bulbs with 400 watts are more efficient than those with lesser wattages. The most popular HPS bulb on the market is this one. The finest HPS bulbs are 400 watts, because they produce more heat. Compared to the other wattages, it may also produce a larger amount of PAR.

The ballast and reflector are offered separately from 400 watt HPS lamps. However, you need not be concerned about the cost. The bulb is available at a low cost. HPS bulbs with 400 watts can also be purchased in a grow light fixture.

600 Watt HPS Bulbs

The best HPS bulb for gardening is a 600 watt HPS light. At 150 lumens per watt, this bulb is capable of producing up to 90,000 lumens This wattage is capable of converting a large amount of electricity into useful light.

While it’s a great HPS bulb size, this one also wastes the least amount of energy. It has a 4.5′ x 4.5′ or 1.4m x 1.4m area that can be lit. The distance between the canopy and the plants should be 18 inches. To ensure that your plants receive equal amounts of light, ensure that the plant distance is properly enforced.

1000 Watt HPS Bulbs

Although they are more efficient than 400 watts bulbs, 1000 watt bulbs are not as powerful as the 600 watts. Although it has a bigger lamp, it also creates more heat. Your plants may suffer greatly as a result of the heat. Before utilizing 1000-watt lamps, growers advocate using two 600-watt bulbs. This will allow your plants to become used to the increased temperature before switching to a higher wattage light bulb or fixture.

For those with a 6′ by 6′ or 1.8m x 1.8m garden, the optimal HPS bulb size is a 1000 watt bulb. There should be a 24-inch distance between plants and a hydroponic tent.

Frequently Asked Questions

Q: What’s the best size HPS grow light?

Grow lights of any wattage are preferable if they provide enough light and phosphor (PPFD) for your plants to thrive. There are a number of factors to consider when choosing the correct grow light for your plants, including how much PAR and Lumens they need (note: most plants need 50-70 PPFD per square foot, but it’s safe to make sure you know the right levels for your plants).

Finding a lamp that produces the PAR your plants require is easy once you’ve figured out the intensity your plants require. For example, Yield Lab’s HPS grow lights come with PAR charts that display the PPFD at every point in its footprint. Find the light that provides the coverage you need in the area where you plan to grow plants by studying the charts. Because most flowering plants require a maximum light output of 1050 lux, you’ll want to go with something in the 600w to 700w range.

Keep in mind that the amount of PAR your plants need will change as they mature. Check to see if your light can alter its PAR output to meet your plant’s specific growth requirements.

Q: How much does it cost to run an HPS grow light?

Calculating how much it costs to run an HPS grow light may be done by calculating the wattage of the light you’ll be using by the number of days in the month. Let me give you an example of how simple it really is:

It is important to note that rates are measured in KWH, which is 1000 watts an hour.

For example, a 600-watt-power grow light will use about a kilowatt-hour of power in one hour. Divide 600 by 1000, and you’ll have. 6, which indicates your light will go out in one hour. 6KW.

Next, you’ll need to divide that figure by the amount of hours you plan to use the light for. If you’re a couch potato, you’ll be running for 16 hours a day, seven days a week. That works out to an average daily consumption of 9.6KW of electricity.

Add your rates to that number and see how much you’ll make. An average of $0.26 per kilowatt-hour is what you can expect to be charged for your electricity. In order to acquire an anticipated daily cost of $2.50, multiply 9.6 x.26 by 9.6.

Finally, multiply the daily fee by the number of days in the month to get a ballpark idea of your monthly costs. An anticipated monthly payment of $75 would be calculated by multiplying 2.50 by 30.

You may learn more about how to calculate your monthly electric cost by clicking here to read our article.

Q: How much heat do HPS grow lights produce?

Infrared heat from HPS grow lights reaches a maximum temperature of 5400°F. Your bulb emits heat temperature instead of light, and the brighter your light is, the more heat temperature you’ll generate.

As long as your grow room is well ventilated, you won’t notice much of a difference between the temperature of the room and the temperature of the bulbs. You’ll have to deal with higher temperatures and humidity levels as a result of that heat. Because of this, it’s critical that your growing space has adequate airflow and ventilation, regardless of the size of your HPS grow lamp.

Q: How long should I leave my HPS grow light on each day?

Your plants’ stage of growth dictates how long you leave your grow light on each day. The majority of plants are phototropic, which means they rely on light to guide their growth. As a result, you’ll be leaving your lights on for varying lengths of time depending on your level of development:

It is common for producers to leave their lights on for 16-24 hours a day, with no more than 8 hours of darkness.

Growers will leave lights on for 16 hours with 8 hours of darkness during the vegging stage of growth.

A grower’s lights will only be on for 12 hours a day when the plants are flowering and ready for harvest.

In the case of non-phototropic plants (also known as auto-flowering plants), you can leave the lights on for anything from 12 to 24 hours a day during the plant’s life cycle.

Q:Where should I place my HPS grow light in relation to my crops?

It all relies on the intensity and brightness of your grow light when it comes to hanging it. To ensure that your plants get the best possible light, you’ll also want to make sure that they don’t get too much or too little of it.

It’s a good idea to keep your plants at least a foot away from the heater.

Attempting to go too far with your plants will cause them to spread out, weaken them, and prevent them from producing healthy foliage.

That’s why it’s so important to hang your lamp at the appropriate height. As a general rule, you should keep your lights 12-30 inches away from the canopy’s peak. However, the intensity of your lighting will have an impact on this:

  • Plants can be placed between 12 and 19 inches away from 400 watt HPS grow lights.
  • It is recommended that 600w HPS grow lights be positioned 14″-25″ apart from plants.
  • Plants should be 16-31″ distant from 1000w HPS grow lights.

Note: You’ll need to change the light height as your plants grow. Because the plants will need more intensity when they’re in the blossoming stage, That being said, you can keep your lights at 16-30″ above plants during the vegging period, and 12-20″ above plants during the flowering stage.


You can get the most out of your indoor garden by using HPS bulbs. When deciding on an HPS bulb for your garden, keep in mind the size of the space and the types of plants you intend to retain. It’s best to consult with an expert when it comes to designing your grow light system.

HPS bulbs come in a wide variety of shapes and sizes. Other companies exist, but we’ve chosen these five to represent the best of the best. Don’t forget to leave a remark if you have any suggestions or stories to tell. Thank you for taking the time to read this!

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