These bulbs are smaller than I expected, the glass portion is just under 2 inches in diameter. Screwing into an ordinary light bulb socket, I wanted to build these into children's bedside lamps. I didn't expect them to change color either. When the light is first turned on, all LEDs are red, then they all change to another color, and then to the next color. Then, after a minute, the timing for each individual LED changes so that each LED changes color to the next at a different time, giving you the appearance of bright, multicolored Christmas lights. The bulb isn't bright enough to do anything, but I suppose you can use it at night to navigate a dark hallway or room. It's really cute and the kids love it.
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