These are amazing lamps. As an electrician, I only see a change in energy efficiency at lower operating temperatures. And while you might think you'd have to change the brightness to a dimmer one to improve efficiency, that's not the case. These bulbs are at least four times brighter than the bulbs they replaced, and I feel a lot more comfortable knowing that these bulbs are actually cold enough to touch and don't pose a fire hazard. They're definitely worth the money, but you can't bet a dollar amount on security.
Smart bulb Yandex with Alice, base E27, 8 W, RGB color
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