BLUE TONGUE SKINKS

So im going to be getting a northern skink soon but i still need to finish setting up the cage. Im having a little trouble deciiding on a few things and would appreiciate all of your advice on it.So heres what im having trouble with.
1.What lighting to get
2. What is a good and accurate thermometer/hygrometer
3. What is a good supplement to get an how often to give it
4. What is a good timer for the lighting

I've had good luck with tork mechanical outdoor timers:

https://www.amazon.com/601A-Outdoor-Gen ... door+timer

You can get them with one or two outlets. They have a cover protecting the dial. I've used four for several years on aquariums, skink cage, etc and none have failed yet.