Most planetarium programs have a "night" setting which gives you mostly a redlight apperance. But you can be sure some bright message will pop up and blind you! I have a piece of red perspex (a kind gift) I put over my screen with a couple of pieces of bluetac, then I turn the brightness right down. Then I choose the right setting on Stellarium to give me the best view - cannot remember if it is the ordinary daytime setting or the nighttime setting. I find that is very red and very low light. I can see the screen and mouse pointer just fine - it's the keyboard I cannot see then! Need a redlight torch to illuminate that, if I need to type!
Search the threads - you'll find the perspex mentioned and also a red gel film (theater lighting supplies, I think).
) and answered those questions. 
