These bulbs were tested for 8 hours in 6 x 8 x 5 inch waterproof sealed fixtures in my spa room. Replacement of 18W compact fluorescent lamps. The lamps felt cool. even after 8 hours of continuous use. I wish it was 3000 or 2700 colors but the daylight color actually makes the tub easier to clean. Very bright and definitely worth the money, especially considering the energy savings and 5 year guarantee. Update: It's 1 year since I installed these lamps. I had an issue with a lightbulb, but the company honored their 5 year warranty and quickly replaced the lightbulb. I like a company that stands behind their product quality and guarantee. I will definitely buy from them again. service +++. RMM
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