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CRI, or Color Rendering Index, is a quantification of how faithfully a light source reveals the relative color of various objects, as perceived by ...
What are lumens, and are they useful for evaluating grow lights? Lumens are a measure of luminous flux, or the total amount of visible light radia...
Yes, our grow lights provide complete coverage of the plant biological active radiation spectrum from 350 to 750nm, including UV and IR. Our Phyto-...
Why do some LEDs appear dim? Your new Black Dog LED grow light arrived in the mail; you unpack it, put on your no. 5 welding glasses (safety first...
It is very important to run your growing area warmer with our LED grow lights than with HPS, MH, CMH/LEC, fluorescent, or even white LED lights. Be...
Which PhytoMAX-2 light do I need to replace my existing grow light? There are a lot of different grow lights on the market, and each one is differ...
Yes, our lights will work with 110/120 volts and 220/240 volts; PhytoMAX-2 even work up to 250 volts-- all you need is the right power cord to plug...
The answer depends entirely on the size of the plants! The number of plants that can be grown under a light is the number that would fit in the app...
Is it normal to see purple streaks on the stems / petioles? No, LED lights do not cause any kind of nutrient deficiency; purple streaks on stems a...
The "Efficiency Myth" and the Difference Between 1W, 3W, 5W, 10W and COB LEDS. Because LED technology is so new, it is often hard to understand the...
Yes, we offer multiple-light discounts! The amount of the discount depends on the number of lights and which model(s) you need, as well as how quic...
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