In my 30 x 34 foot garage, I had 16 overhead lights. It wasn't dark, but there were shadows. I took out two lightbulbs and replaced them with these wonderful inventions. I liked them so much that I bought two more. Now it was probably redundant, but I like my workspace to be bright. These lights did their job. I also bought one for my dad's garage and what's the difference only one sat in a regular two stall garage. They can direct the light to cover problem areas and overall I wouldn't hesitate to buy more if I had to.
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