Im currently using a Electronic Digital All in One 600W
Greenhouse Light with a 600W Planta-T High Pressure Sodium the reflector on this unit directs the heat directly down no heat above the reflector whatsoevr so it suits my needs perfectly its a great lamp for growing in open space thought it might be to hot for a smaller room or box .There is virtually no heat from the ballast and its very cost effective i use it along with a 1000 watt and i swear its brighter.does anyone else use this type lamp?.the postman.