no,You need both uva and uvb light
No, these two animals cannot live together well. The turtle will often attack the crab in an effort to eat it, and it is not advisable for them to live in the same tank together.
without the suns light then no without electricity light then yes
For a short period of time yes. Eventually you will need one if you want your turtle to be healthy and live longer.
Animals do not require light to live, however, without light they cannot see, and would have a harder time finding food, etc.
Temperate or wetlands
no
A slider turtle is basically like a category of turtles including the Yellow Belly Slider Turtle and the Red Eared Slider turtle.
The red ear slider terrapin lives up to 50 years
Temperate or wetlands
no a plant needs light
5 minutes
Well, in my experience my two male red- eared sliders get along pretty well. Sometimes they will fight for food.