I think these would work.

I think these would work. The use of an umbrella or soft box allows the light to be spread out evenly, which is what you want for a green screen. The downside is that the lights may not be bright enough since it’s either beingreflectedoff the umbrella or shining through the soft box.

I don’t have arecombinedamout of wattage to suggest because I don’t really do green screen work though. Sorry.