I have a AW UVC 9w light bulb and I’m not quite sure if this is the right lighting for my red eared slider. The bulb can be put underwater to prevent any harm to the eyes or skin. Will this UVC light be harmful for my turtle or is it just like the UVB light for basking?
first a little about the difference of UVC vs UVB light,UVB is what makes us tanned a too large dose will make us sunburned but we need the UVB to make d-vitamins in our skin https://en.wikipedia.org/wiki/Ultraviolet
UVC is light with a shorter wawelenght and it will therfore penetrate deeper into the skin and this might cause skin cancer,damage to the eyes and severe skin burns.(not the same as a sunburn,deeper in the skin and therefore more dangerous)
UVC is used by water supliers to kill bacteria and viruses it works by making the micro organisms sterile so they are unable to multiply,UVC is also used on fish tanks,garden ponds and in comercial fish production to lower the amount of bacteria-algae-viruses and parasites in the water.
UVC is used to sterilize surgical equipment at your doctors office,at the dentist and in hospitals.
so DO NOT USE UVC LIGHT on any animal or plant,and be careful when you use UVB on your turtle a little UVB is good a lot of UVB can be harmful.
It is not for basking.
UVB-Light allows the metabolism of your turtle to work correctly. UVC-light is used to kill germs, and does not even naturally occur below the tropopause of the atmosphere.
So, totally different lights, you will need an UVB-lamp.
Also see the Wikipedia-entry for more details :).