How much is too much? I know things are tight these days but get a good light. Get something practical and easy to use. Get a handheld and a gun mounted light.
Take a look at this light. Cost me about $115.00. Well worth the cost though. Easy to use both when shooting or not shooting the gun. Practicing light management is a must. Because batteries die at the worst time, one light backs up the other. Also, some people don't like pointing guns with lights at people that might not need to be shot.