After hours of research and money wasted, I've come to the realization that tomorrow I won't be turning on the 50 watt coil UVB bulb I have clamped over my lil Russian tortoise. I've had her for a month with this coiled bulb, and have wondered every day why her eyes seem swollen. It's from the crappy bulb that the petstore guy recommended, just like the aquarium he recommended that stressed her out. One thing I've learned for sure is petstore workers don't have their facts straight. And I feel so guilty that Delilah has had to suffer with a bulb that is bad for her eyes. I'll be racing to the petstore on my lunch hour tomorrow to purchase a fixture and a tube bulb. My questions is: What type of bulb do I get? How many watts? My custom built box is 7 foot long by 3 foot wide, with the main section where the bulb will be installed only 5 foot long and 3 foot wide. Any guidance is greatly appreciated. I just want to give her the best care I can. And I can only hope her eyes haven't been damaged from being under the wrong type of bulb for so long (one month & one week).