So I'm looking at getting back into the game. I had a slab leak that basically soaked the bottom of my old stand and made it...shall we say...structurally unsound. It was a mess. But since I've been out of the hobby, these little things have popped up. I read the first ten pages and they seem pretty safe. No fires or anything which is always my biggest concern with any product from China that you get on ebay (granted they're on Amazon now too).
Would the 300 watt unit give a 75 gallon (standard 48" x 18" variety) sufficient coverage, or would the corners of the aquarium be too dark?