Lighting for my iguana?

What type of light bulbs should i use for my iguana? he has an outside tank, i live in mexico but there is no humidity and its the rainy season and its very cold, so every day i have to go and move him to his sleeping cage when it starts to rain. so i was thinking about getting him a glass tank. i want him to have the best lighting. he is a baby by the way. also not eating well at the moment but i think its because he isn't getting proper sunlight. so what should i get? also i would like plans to make a large indoor glass tank, if anyone knows a good place to buy one or that has good plans, send me the link!