Pamela, for lower light you need lower temperatures, not higher. Twelve hours is not a lot. Summer sunshine gives brighter and more hours of light than that. I don't know anything about basking lights, you want a light that provides the right kind of light for plants but does not give off a lot of heat.
Edited to add - I looked for info on reptile basking lights and I'm not sure that they are the right kind of light, and they may give off too much heat. I think you might have posted info on your light on another thread, would you mind repeating it here?
