These lamps are undeniably very bright. However, they get very hot. Probably as hot as a 100w incandescent bulb. I'd be shocked if these bulbs really only used 20 watts each, converting that much heat from energy. Chamber sealed as is, I would be surprised to see them last as long as advertised. Also, incandescent bulbs are *not* 3000K "warm white". At least not the ones they sent me. There were four separate boxes inside the bag and only the color and wattage were marked on the bag, the boxes and bulbs were not. I suspect there's a chance the 5000K tubes were incorrectly packaged as 3000K. As you can see from the photos, all my other LED bulbs are 3000K and are all roughly the same color. Even from different manufacturers. These bulbs (three installed) are significantly more blue-white, most likely 5000K.
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