I'm in Thailand, where it's either hot or very hot, same with humidity. I'm growing outdoor, using a light for veg. ATM I've borrowed a friends, it's 240w, but am looking buy my own. I'd like something for around 1m sq or a touch less. If it's only for veg will any half decent light do? At a glance, the lights with several bars, rather than a single unit look cooler. Is this correct? Thanks.