I bought these bulbs to replace my 100w 1600 lumen LEDs. With the advertised 2550 lumens, I expected the bulbs to be significantly brighter, but they were only slightly brighter. Comparing these lamps to my previous ones, I thought that these lamps had a light output of only 1900 lumens to 2000 lumens. However, they are lighter than my previous one and I will most likely buy them again for that reason. These bulbs are quite heavy and larger than standard E26 bulbs so they ended up sticking out of my bulbs (and didn't even fit in one of my bulbs). Also, the top does feel cold to the touch, but the plastic part under the glass bulb gets very hot (although I think other LEDs do the same). Good buy but not 5 stars.
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