blue. I got these bulbs at 2700K and at full power they glow a pleasing color. A regular dimmer already installed for incandescent bulbs will work fine. Lamps can be dimmed to a very low level. My only complaint is that the color appears too gray at low levels, probably just a trait of any LED lamp. PAR38 ensures a good concentration of light on my kitchen worktops. The price was lower than the first brand I bought but they just seem great. Can't comment on longevity as I've only had it for a few weeks. I recommend them.
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