We installed 39 50W R20 2700 90 CRI replacement bulbs. They are cool. Bright, subdued light with excellent color rendering. I was a little nervous that they would be too boring, harsh or badly colored. It was amazing (about a month). With Leviton 6674 dimmers. No flickering, although with these dimmers the bulbs take a full second to light up. With a regular switch, the lightbulbs turn on instantly. The 25 lightbulbs we installed in the kitchen family room made the room a lot cooler as my wife uses the large island for her sewing projects and she always has all the lights on. We've probably saved enough on air conditioning costs to pay for lightbulbs and dimmers in just a few months. We installed the remaining 14 in 3 bathrooms (4-4-6). The brightness and color of the light is perfect.
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