Purchased to replace overhead lights in my 1996-2004 Keystone Fifth Wheel Camper to replace 12v bulbs. I bought the brightest Super Bright or whatever they are called instead of Warm White and am very happy with it. I have replaced all 17 internal bulbs and 1 external bulb and these bulbs are able to increase the lumen significantly and make it much brighter in the RV, I have early cataracts and can't see well in low light. I had no trouble installing them and they worked fine so obviously the polarity in my lights is correct. and the replacement worked fine in that outlet too. brightness of incandescent lamps. They are a nice natural daylight fluorescent type like white and not bluish in color (or a yellowish warm white variant) as I've read that some manufacturers make the brightest substitutes. I bought these because I have 80 SMD LEDs and I'm glad I did. These are probably the brightest you will find. They don't have metal frames to support LEDs, but I don't expect any durability issues, although those with metal frames should be the most durable. Kind! Sincerely, Ronald L. Blake
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