Question about turtle tank lighting?

UVA is produced by any "white light" emitting bulb, including reptile heat bulbs and even the UVB bulb. The turtles should have access to UVB and a basking heat source for 10 - 12 hours a day. The only way to get heat and both UV's from one bulb is to use a MVB (mercury vapor bulb.) MegaRay (http://www.reptileuv.com/) makes a decent MVB.

I would stick with the basking light...but please do not overheat the turtle!

the reason Turtles need UVA ultra violet light is because this is Sunlight

ONLY Sunlight produces Vitamin D on the skin and hides of Animals; (including humans)

so if the purpose of the UV light is to provide Vitamin D from Sunshine;

then you can add FISH OIL or Fish Liver oil like Cod Liver Oil to the diet

just take a fish oil cap; put a drop on turtle pellet; put pellets in tank; so the Vitamin A and Vitamin D in Fish oil or Cod Liver oil give Turtle Vit. D

You could put the tank in a warmer spot and use the UV light occasionly

Buy a smaller cheap dome clamp lamp (they're most likly around $10-$20 depending on where you go) and put the UV-B pointed toward your basking spot. Take the lamp you have now and aim it toward the basking spot as well. Since you already have both bulbs, you'll only be out $10 or so and your turtle will have everything he needs. =)

I had 2 red eared sliders, one I had to grant away and the different one I nonetheless have. I continuously have became off the ordinary in the course of the nighttime. they want to sleep besides. besides, if I kept the ordinary on (the turtle tanks is in my room) i does no longer be in a position to sleep! delight in the reptiles!