Quote Originally Posted by the image reaper
my metal-halide 'vegging' lamps are 2100K, my HPS 'flower' lamps are 4000K ... I have used my HPS for complete grows, seed thru harvest ... although warned of stretching with the sodium lamps, I experienced none ... plants grew normally :smokin:
Dude you got that backwards HPS are 2100K and MH are 4000K.