Please use the following link and tell me what you think of these bulbs for a CP terrarium. http://catalog2.panasonic.com/webapp....FA23E50 It puts out 5000K light at the equivalent of a 90 watt incandescent. I think 2 bulbs would probably suffice in a tank that is 20"x10". Any more and I would need a welders mask to view my plants.Thoughts?