What's the difference between the fluorescent bulbs that you buy at the petstore for the UVB and the bulbs that you buy can buy at Target? Are they the same thing? Because I looked at the petstore and they want $19.99 for a 26 watt and Target wants $4.55 for one. Now I'm confused because they look the same to me. I know that some of you say you use the .5 or .10 in your hoods, what does that mean? Does it mean Wattage like on the bulbs at Target?