The color changing version is a breakthrough in lighting, creating a warm, comfortable light for sleeping. These are upgrades from a previous version that only emitted blue light. I have a set of these that I bought a year ago. They're great, but blue light is a color that research has shown disrupts sleep by triggering the brain's wake-up response. When I saw this new version, I bought four sets, three of them as gifts. I plan to set them to a reddish color, which should minimize the sleep-disrupting blue portion of the light spectrum. I'll keep my old blue ones out of the bedroom. I will update this review after I have had a chance to test the light and I will upgrade my rating to 5 stars if they are as reliable as the previous version and emit the correct color light.
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