Me again, and using the same old photo.
I don't have a lightbar, but added the two Rough Country flood lights near the rear view mirrors.
My night rides are 1) plowing, 2) crawling on rough Uintah forest roads, and 3) fast southern Utah back country roads.
The flood (as opposed to spot) lights are great for 1 and 2, and they're mounted high enough to clear the blade.
They're not so good for 3), flying down roads in So. Utah at night - they don't have the reach.
Even a small lightbar will do a better job at both longer distance spot lighting and closer flood lighting.
Light envy is an expensive crush.
There are a lot of options for interior, rock and backup lights and I hope others give you their thoughts.
I chose a minimal route for a dome light. Google UTV Dome Light and you'll see the options.
I bought this one for $20 on Amazon and it does what I need. I have it strapped to the ROPS in the middle of the machine.
I can use the spot or flood lights. It can be turned in the snap-in holder to light up the front or bed and you can pop it out and use it as a flashlight. One end has a magnet for hands free use. It recharges through your usb port, but I haven't tested battery life. It's not a ton of light, but it's more than a car dome light.
For a rear view mirror, I really think a wide convex mirror that hangs from the ROPS is best.
They sell some with a single center mount, but I prefer the double mount for stability.
Google them and there are plenty of options starting at $18.
As 05Willys said, them's my pearls and we're here to help you spend your money.