Lumens, Watts, Power Draw, PAR, Grow Area Coverage
Many growers ask us about the Lumen output of our full spectrum LED grow lights. Lumens is a measure of how bright a light will appear to the human eye, not how well a light will grow plants. Trying to rate a LED grow light by its Lumen output will not accurately describe the growing ability of the LED grow light. LED grow lights target specific wavelengths of the light spectrum needed for plant photosynthesis. Since the human eye is most sensitive to colors plants don’t need such as green, and least sensitive to colors plants prefer, Lumens can’t be used to accurately compare the plant growing capability of LED grow lights.
Here is an example that brings this idea to light. In movie production many scenes are filmed with a “green screen” background which later is filled in with whatever landscape is needed. The reason the screen is green is because this is the color most easily seen by the human eye. On the other hand, green plants reflect the green wavelength of the visible spectrum of light. G8LED lights sold by Dorm Grow LED do not have any green wavelength diodes as these are not the optimal wavelengths needed for photosynthesis of plants.
What is the best way to measure the strength and effectiveness of LED grow lights? The strength or intensity of the light can be roughly measured by the total power draw of the LED grow light. The higher the power draw, the more intense the light will be. Another measure is the photosynthetic action radiation (PAR) output of a grow light which measures the effectiveness of a grow light for photosynthesis or growth. PAR is measured in micro mole units or uMol which is also known as the photon flux density of light per meter squared per second. Effective PAR ratings should be above 600uMol to be highly effective in photosynthesis or the growth of the plant. G8LED grow lights have PAR ratings of 1200-3600 uMol which means they are very effective in growing plants! If photon flux density of light per meter squared per second is too confusing for you, we have simplified the specification and provided the recommended grow area coverage for each LED grow light. For example, the G8-240 will provide 6 +square feet of coverage, the G8-450 will provide 12+ square feet, the G8-600 will provide 18+ square feet and the G8-900 will provide 24+ square feet. If you have any questions regarding Dorm Grow LED’s line of full spectrum LED grow lights by G8LED please email us at firstname.lastname@example.orgRead More
This is a short clip from one of our customers producing 2 tomato plants with our 450 LED Grow Light. Indoor tomato growing through LED grow lights is becoming more and more popular with growers. We’ve spent years of research and tested many lights to produce G8 LED Grow Light, and thanks to our customers who actually use our lights for their own purpose, we can now see our research come to fruition.
Most of our clients ask us can we grow tomatoes indoor with LED grow lights? The answer is yes. This video is a time lapse of almost 3 months of indoor growing with our very own 450 watt G8 LED grow light. The tomatoes came out perfect and they were very juicy.
Wattage & Power Draw – Why the Confusion?
LED Grow Light specifications include the Wattage, or Power of the light. However, there is a great deal of confusion over Wattage and actual Power Draw. Why are there even 2 different specs and how does the customer decipher what is really going on? For example, the G8-600 by G8LED is 600 Watt grow lights but the actual power draw as stated on the product spec page is 480 Watts. Why??
First let’s remember that Power (Watts) = Voltage x I(Current)
LED plant lights are grouped by the current (Amps) of the diodes within the light. 1 watt diodes generally run at around 0.35 Amps, 2 watt diodes run around 0.5 Amps and 3 watt diodes run around 0.7 Amps. Diodes are not maximized with current so that the manufacturer can increase the lifespan, reduce the heat output, and supply a better grow light. In addition, different color diodes have different wavelengths and require a different supply voltage for the specific wavelength. The red and orange wavelengths require around 1.8-2.7 Volts and the blue and violet wavelengths require 2.7-3.5 Volts. Hence, following our W = V x I equation, a 3 watt red diode may only have a power draw of 1.5-2.0 watts and a blue diode may only have a power draw of 1.8-2.5 watts. That is why we have the stated wattage of the light and the actual power draw. Hence, the 600 Watt grow light has 200 x 3 watt diodes but the actual power draw is 480 Watts. Some LED companies do not publish the actual power draw. Be careful of these companies and make sure you make an apple to apple comparison when it looking for the right LED for your given grow space.Read More
Want to Maximize your Yield with LED Grow Lights?
G8LED grow lights are formulated for both vegging and flowering. However, do you want to get the best yield possible from your harvest? Of course you do! Slap on the All Red 90 watt LED grow light to maximize your yield. Why All Red you may ask? Because 660nm red is the key to flowering success!! 660nm is the main wavelength that allows plants to flower. HPS bulbs give off a very bright yellow-orange light which contain the 660nm red wavelengths and this is why indoor growers using HID systems switch from metal halide to high pressure sodium when it comes time for flowering.
When growing with a LED grow light, it just makes sense to increase the red wavelengths and give a BOOST to your flowering phase. Some HID growers even add the All Red 90 watt LED grow light as an add-on to their HPS setup. Of course we are going LED all the way and not messing around with old technology high intensity discharge bulbs…they waste too much energy in the form of yellow light and heat. The LED grower is looking to utilize LED technology with high power LED grow lights and grow more efficiently. Here are a couple recommended setups:
- G8LED 450 Watt LED Grow Light (4’x4’ coverage) – add 1 All Red 90 watt UFO per setup
- G8LED 600 Watt LED Grow Light (5’x5’) coverage – add 3 All Red 90 watt UFO per 2 setups