BatMaN SKuNK
New Member
Those Phillips Retro Whites only go to 400 watt right?Spectral comparison of a CMH vs a HPS.
View attachment 2211508
Here's a quote from another board..
"The ceramic halide conversion bulb is rated at 34,800 initial and 29,600 approx. mean lumens, but a cheap ($32.00) plain old HPS has 50,000 initial lumens and a nice Hortilux bulb designed for plants has 55,000 initial lumens. Also, the Hortilux is listed as having a color temp of 2100K, and the ceramic is 4000K, which is something to consider. Basically, the bulb is a conversion bulb for better looking lighting in warehouses, and conversion bulbs are always less efficient than dedicated bulb/ballast combos, plus metal halides are unnecessary anyway what with modern HPS bulbs being so well designed I'd say use it then sell it and get a digital ballast and a bulb designed for horticulture."