Go any lower to 1000K, and the blue light will drop below what is good for plants. Go higher than 5000K, and so much red light is left out from the spectrum your plants will grow slowly and without much vigor.
Hereof, can CFL lights be used as grow lights?
Compact fluorescent light bulbs are a good source of supplemental light for growing plants in low-light conditions or for providing extra light to increase the day length and encourage blooming.
Also, how many CFLs does a plant need?
We have concluded that how many CFLs watts per plant required is about 150 watts or less per square foot. CFL lights will produce less heat making it safe to be placed close to your plants. Therefore, they are especially great for tight space.
Will 5000K daylight LED grow plants?
Ideally, your plants will benefit from anything daylight ranging from 5000k to 6500k. So, you can stick with whichever one. Both 5000k and 6500k are great for the vegetative phase, flowering phase, and fruiting phase. So, they are ideal for the general growth of your plants.
5000K Color Range
The quality of this light is bright and crisp. Small details stand out under this type of light because of the color contrast this crisp light offers. This LED color is best used in industrial spaces, such as factories, or other workplaces where details are important, such as surgery and exam rooms.
So the answer is that for 2-3 plants, and each plant contains 1 square foot, you should need not less than 150 wattages. In terms of lumens, it’s always great if you can have as much as possible as long as your space can handle the heats, up to around 10000 Lux. That is the case of CFLs.
When using CFL bulbs to grow a plant with a high light requirement (like cannabis), you want a minimum of 60 watts per square foot. Ideally, you want 100 watts per square foot. And it doesn’t hurt to go higher (though there’s not much point going over 150w). You really can’t give your plants too much CFL light.
Efficiency—While incandescent bulbs and CFLs generate most of their energy in heat, LEDs are cool to the touch—which translates into less wasted energy. … LEDs are more efficient than even CFLs: A 16.5-watt LED bulb is equivalent to a 20-watt CFL and a 75-watt incandescent.