The only thing I found was this.
Sunburst 250 Watt Metal Halide System
Its not air cooled but I've seen where people will cut a hole in the top and put a 6" flange on it to accept the hose and use it to suck the hot air out.
killerweed420 Reviewed by killerweed420 on . 250 watt HPS Air Cooled Grow Light...HELP Can someone please help me find a 250 watt HPS air cooled grow light for under 150 bucks? ive looked everywhere, i cant find anything cheaper then 189.00 air cooled + shipping. ouch! i could go with a light/ballast one like a sunsystem but i dont want the heat in my grow tent from the ballast. Please help! Rating: 5