You're best getting a wooden viv if you want a Leopard Gecko. Glass just won't retain the heat. You'll find the wood vivs cheaper than the glass one as well. Check out Vivexotic Viva and Monkfield Terranium. Both ideal for the Leopard gecko
Edit: also you won't need to use any kind of light for your gecko. It will get all the light it needs from the daylight that comes through your windows. Even though it won't come out until the evening or night