I asked on the sci.engr.lighting newsgroup and the claim was that the bulbs are rated for 25C. The basement is lucky to hit 20C. I'm going to use two 12v fans. One pushing in air one pulling it out. Yesterday I found out somebody opened up a surplus store nearby. No more 40 minute drives just to wander around and look at junk They have a 12v lead acid rechargable on sale this week for $12 that I'll use for the fans. Over kill but I already have the charger.
Right now I'm thinking one of those 105watt bulbs should be enough. No? I might go for two. The intended size for the head is 12"x12"x18". With the head being at least 12"x12" I'm hoping the light will be even enough in the centre 8x10 area.