I use these in my motorhome which comes with #921 bulbs in all interior lights, there are 28 in total. I bought 10 of these for the first time and have been very pleased. The color and brightness are very close to those of incandescent lamps. The change was easy and all LEDs worked perfectly. I ordered a second set of 10 units and am now ready to order a third set of 10 units to complete the upgrade. They use much less power (1.5W vs. 18W) and generate less heat. We like to go on dry hikes (no plugs) and switching the LEDs significantly increases battery life. I've attached a photo of a light fixture with the LED on the right and the original bulb on the left. The camera sees more differences than the naked eye can see and it's very close. Brightness is also slightly lower (220 lumens for the LED versus 264 lumens for the 921) but barely noticeable. I tried 4 other LEDs, some very expensive, before I bought this one and none of them were satisfactory, too dull and bluish in colour. It's great and the price is pretty reasonable.
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