The red lights are fairly pricy, but worth it if you can afford them. One suggestion, keep your receipts, I'd say half of the red lights burn out within the first week. I would definitely get an under tank heater though. You could still use the white light, but yes only for 10 hours. Personally I would try to get the temp up to 85-90 during the day. Make sure you are taking the temp from the floor of the tank, not the air. My favorite leo website, with the best information is www.drgecko.com, it really helped me out in the past. If you have any other questions you can e-mail me at lisa_cristin_callow@yahoo.com, I would be more than happy to help out if I can. I only have four years of experience with leos, but I have done quite a bit of research on their housing requirements. If you treat your leo right they can live 20 years. Good luck 
Lisa
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0.1 Hypo Leopard Gecko
0.1 Albino Leopard Gecko
0.1 Blizzard Leopard Gecko
1.0 Albino Pacman Frog
1.0 Lovebird (Tony)
1.0 Elkhound Cross (Otto)
0.1 Malamute Cross (Paris)
6.0 Bettas