How much area can a plant grow light illuminate with 100 watts?

Plant lights do not have much to do with wattage, mainly color temperature, color temperature affects photosynthesis
The light required for plant photosynthesis has a wavelength of around 400 720nm.400 520nm (blue) light and 610 720nm (red) light contribute the most to photosynthesis.520 610nm (green) light has a very low absorption rate by plant pigments.

1. According to the above principles, plant lamps are basically made into red and blue combination, full blue, full red three forms to provide red and blue two wavelengths of light, covering the wavelength range required for photosynthesis. In terms of visual effects, the red and blue combination of plant lights appear pink.

2. White LED lights, the most common is the use of blue core, stimulate yellow phosphor, resulting in a composite visual white light effect. In terms of energy distribution, there are two peaks in the blue region at 445nm and the yellow-green region at 550nm. The 610 720nm red light required by plants is very scarce. This explains why plants grow poorly under white leds.

3. The red and blue chromatographic ratio of the plant lamp is generally between 5:1 10:1, and the ratio of 7 8:1 is usually selected. Of course, there are conditions that can adjust the ratio of red and blue light according to the plant growth cycle.

4. When using plant lamps to fill the light of plants, the height of the general distance from the leaves is 0.5 meters.