Most peeps use the custom light packs from DRP, the "Lightz" pack gives a better effect with buildings and scenery, and can be easily hidden. The little light nodes can be a real pain in the *** to remove after you've placed them tho. Thats where the "Ampience" pack comes in. It does everything that Lightz did, only the lighing nodes are much larger for easy placement and removal, but will need to be hidden behind buildings and walls otherwise they look unsightly. Downloads below, all include info on how to install and use them: