HPS Grow Lights

What are HPS Grow Lights?

High Pressure Sodium Grow Lights, or HPS Grow Lights, have been popular for decades. LED grow lights are growing in popularity, but HPS grow lights continue to have a very strong following. Similar to Metal Halide grow lights, HPS grow lights are a type of High Intensity Discharge (HID) lights, or bulbs, that emit very strong light in the yellow, orange and red spectrums. These spectrums are ideal for the flowering and budding stages of some plants. HPS grow lights also have a high light output, known as lumens, per watt which means you gain a brighter bulb with less power consumption. Street lights have a yellow glow because they are HPS lights! HPS lights ar eless efficient than LED lights, but your grow room will determine which type of light you should use.

The Make Up of HPS Grow Lights and their Parts

HPS lights are glass bulbs that encase a smaller tube that is filled with sodium, mercury and xenon.  On both sides of the smaller tube are electrodes that create an electric arc through the internal tube which creates an intense light.

HPS grow lights require additional equipment to operate, so the bulbs require ballasts to support them, and the ballasts also regulate and control the electricity to the bulb. Since HPS bulbs produce a lot of heat, you will also need to keep the fixture cool. Because the bulbs give off so much heat, be mindful not to place the light too close to your plants or you will end up with burnt leaves.  Also, it is very important to keep your grow room within ideal growing temperature ranges, meaning good ventilation and cooling is a must. Finally, you will need a reflective hood to direct the light towards your plants. 

Advantages of Using HPS Grow Lights in your Grow Room

  • Costs can be lower than newer LED lights

  • Long standing leader in the indoor growing industry and is often a favorite for grow rooms

  • Intense light that produces between 50 and 140 lumens per watt

  • Provides excellent spectrum – strong in the yellow, orange and red ranges – ideal for flowering stages

  • Widely available

Disadvantages of Using HPS Grow Lights in your Grow Room

  • Similar to metal halide bulbs, significant heat is produced, requiring adequate ventilation and cooling for your grow room – however, newer bulbs are addressing this

  • As with most HID lights, you will need additional equipment to operate, adding to the overall upfront and operational costs:

    • Ballasts

    • Extra ventilation, cooling and ducting for the entire grow room

    • Cooling for the bulb

    • Hoods

  • Because of the high bulb heat, care must be taken not to burn the leaves of your plants

  • Bulb lifetime is significantly less than LED bulbs and over time, their effectiveness decreases

Know Your Options to High Intensity Discharge Lights

Not all HID Lights are created equal. Here, we discussed High Pressure Sodium lights, but HID lights come in all sorts of flavors. Another type of HID light is the Ceramic Metal Halide Grow light. These types of lights are a newer addition to the club.

CMH Grow Lights are created using a ceramic arc as opposed to quartz which allows the light to reach a higher temperature. The ceramic in these lights also helps the light to achieve the optimal light spectrum for photosynthesis; a must for any serious grow room operation. 

"In terms of light quality, ceramics include ultraviolet and infrared rays in their spectrum, which plants love. The higher amounts of UV rays create stronger, woodier stalks. This means the growth and vigor of your plants will be unmatched, especially in the vegetative stage," said Maximum Yield, a magazine dedicated to serious indoor and outdoor gardening. 

Your Grow Room, Your Lighting Choice!

The choice of lighting systems is very important.  When researching and buying lights for your grow room, you must take several factors into consideration, including power consumption, heat output from the lights, and lifetime of the equipment, including bulb lifetime. You should think of these factors not only for upfront costs, but also for the long term, operational costs.

We are happy to help you with your lighting needs so you can get started growing today!

  • Oct 08, 2017
  • Category: News
  • Comments: 0
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