I have to disagree. My 23W Warm White CFL bulbs put out 1600 lumens and my 70 Watt HPS security light puts out 4900 lumens.
Simple division returns 69.56 lumens per watt for the CFL and 70 lumens per watt for the HPS. I don't see the advantage of the extra expense for a HPS lamp and cool tube.
Quote:
Originally Posted by psionblue  CFL's put out a bit of heat. Two 42 W cfls, with no direct air cooling (no fan blowing on the bulbs), in my cab that has 6" passive and 150cfm out a 6" vent in a 2 x 2 x 4 space, adds 5 degrees to cab temp over room temp.
You will be better off with a 150w or 250W hps in a cooltube. My 250w hps adds 1.5 degrees over room temp in the cab described above. The HPS puts out way more light than CFLS watt for watt. You would need about (15) 42w CFLs to equal (1) 250w hps. |