Vision recommends using a bulb no higher than 60 watts in cages with 6 inch heating shrouds. I have heard that you can increase this wattage with in reason with no problem. For those that use Vision cages for monitors what wattage have you used with no ill effects? Anyone use halogens? I would think that the total heat generated by the bulb is the real factor here and not just the sheer wattage. Thanks for your advice-Bill.