GrowCNanswered grow question 3 years ago Which light might depend on where you are located. Most companies can ship anywhere but shipping is usually faster if you order from a company in your continent. I like Horticultural Lighting Group in N American. In the UK I like Migro (their YouTube lighting reviews are a great reference).
I do not like using one high powered light. Instead I prefer multiple lower powered lights running at partial power. With one light you are screwed if it dies. With multiple lights you can remove the bad light and turn up the power on the others and continue the grow. I also like how multiple lights spreads the light out much more evenly in the grow area so there is less shadowing and hot spots.