Mega Ray bulbs are the best Mercury Vapor reptile bulbs on the market. They have a factory warranty for 6 months, they generally last up to 12 months, and have been tested to last up to 18 months! Coming in three different sizes 70w, 100w, & 160w. You can get the perfect bulb for your reptile's cage! These lamps produce similar amounts of UVB to natural sunlight which is great for your reptiles growth, and development.