|
Why HID Lights Look So Bright
The human eye is very sensitive to light in the yellow and green
regions (500-600 nm).
HID lights produce predominantly yellow and green light,
so they look very bright indeed to the human eye.
Unfortunately, this is the same
part of the spectrum that is least effective for plant growth.
 
|
| Your eye is sensitive exactly where plants are not - in the middle
of the spectrum. If you could "see" like a plant, LED grow lights would
look about 10 times brighter than
they appear to your eyes |
|
TM
TM