Quote:
Originally Posted by HoboCabbage  LEDs seam like a good long term investment. its good to see some results, its hard to believe that you can get such high lumens from such a low power drawing lamp |
I think that because the LEDs for growing produce light that is near the Scotopic light curve, the luminous efficacy reaches the maximum for narrowband light of wavelength 507 nm therefore to the human eye the light is dim but plants are susposed to dig it.