Texasbob and ChAs420 proved that you dont need a ton of cash to get some great buds! CFLs T-5s Viparspectars. A vipar 300 is a good cheap light, v 600 is another decent one. i own one of each. Once you get more into the hobby you can get more expensive lights if you choose...

Id recommend a HLG 260 Rspec! I bought one last year and really like it. goes for about $400. Be careful when you pick an HLG or any grow llight and make sure that it is full spectrum.

HLG  for some reason sells several lights that are only good for vegetation. most of those lights are blue in color. Either way, make sure you get full spectrum