I currently use a UVB stripe light on in the day time for my leopard geckos as well as the red heat light! Is the UVB light really nesecerry for them or am i just wasting money having it on? what are your opions?
Leopard geckos do not need UVB light - they are a nocturnal species and in the wild would not come out in the day, and would never receive the light from the sun. I believe it has been tested and no scientific advantages have been proven to come from using UVB. All the caresheets say it's not necessary, and as there are so many successfull breeders of leopard geckos in the world who don't seem to use UVB, there's no reason to suspect it to be necessary.
Should be using a calcium supplement regardless of lighting.
If really worried you can get a sort of "combination" supplement which is usually a mixture of combination, vitamin d3 and phosophorous which aside from calcium, should be balanced by the diet - but if worried, you can use all 3 to be sure.
It is possible to use too much supplement and overload and that's not good either, I gut load my live food with a variety of fruit and vegetables, and then calcium dust them. I personally don't use d3/phos mixes, just calcium. They should have all the other nutrients necessary if gut loaded.
Calcium is the most important thing, because it helps maintain bone structure, encourage bone growth, and also aids greatly with female egg production. Phosphorous allows energy to be taken from fats in order to use protein - but if you have too much phosphorous, it actually stops the calcium being absorbed. This is why I don't use a combi-vitamin, because it's all too easy to be trying to do the right thing and tip the balance, and cause problems. The balance for a leopard gecko should be an even ratio of 1:1 calcium/phos
UVB allows the animals to produce Vitamin D.
I don't know if anyone else has any scientific or practical data that says leopard geckos benefit from Vitamin D but I have never heard of it myself.
ive asked this question b4 and common belief is they dont even need a light if natural light can get in the viv,i only use a reflector for daytime temps as he sleeps most of the day and would not benefit from uva/b i dont think most ppl do use it as said b4 they are nocturnal,ive got a calcium pot in the viv incase he needs to supplement himself but think thats all they need if food is dusted