What size light bar for ram 1500?

Depending on how much work You want to do, You can theoretically install up to A54 inch light bar on the top of some model years of the Ram 1500, though 50 is recommended with stock brackets. If You're looking to instead fit one in the front bumper, the recommended length with tow hooks is 28 inches, though some drivers have reported being able to cRam up to 32 inches with a few modifications. The most important thing is to find something that both looks nice and functions well. There are a number of kits available from numerous manufacturers, so You'll always be able to find something that strikes Your fancy. Just be sure of what You're getting into before You dive in.