you want the cool side to be 78-80 and the warm side to be 88-90. it is not necessary to drop the temperatures at night. 65 is way too cold for a leo--even if you do a night drop i wouldn't let it get below 78 throughout the cage. unless you are breeding there is no reason to drop temps at night, and even when i bred i didn't drop the temps because my leos didn't require the stimulation of temp and light changes.

return the daylight bulbs and get red (infrared) or nighttime bulbs. you can use them 24-7 with no ill effect on your gecko because they cannot see the light that these bulbs emit. get one that will heat the cool side to 78-80 and one that will heat the warm side to 88-90.