It depends on how many batteries or genny. I work in the automotive field so I had used batteries around and started with driving lights and batteries. Since then I have went to 150w HPS and genny but that has taken a few years. I'm not sold on LEDs yet but giving it a try. If you have a good size genny I would say halo is the cheapest and best light for the price. I would suggest HPS or LED if you are willing to spend more money. Remember most of us started small/cheap and expanded, don't look at what's cheap now but what's better in the long run. That is why I have 8 halos in the garage not being used. They were great for 6 months now have no purpose, would have been better buying 1 HPS or led at a time. IMOA