I'm getting a lot of messages not to cheap out on the lights, but I think the Nicrew 50W might actually be a pretty decent light. According to this thread it has better or at least comparable PAR readings to the AI Prime 16HD (use this for an AI Prime 16HD PAR map). The worst thing about it is it has awful controls. I think it might be worth a try if I can figure out a good way to control it.