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How to create home lighting system in a tight budget
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this post was submitted on 12 Dec 2024
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These are terrible advices.
All smart lightbulbs have a small router in them, so they all use some electricity while switched off. You can gain some net plus only if you live with people who constantly forget to switch off lights. But you need some presence detector as well. Smart lighting is about convenience not energy usage.
Wifi is the worst wireless standard from energy usage standpoint. Zigbee's power usage is much less and devices are cheap. Thread and Z-wave power usage also lower than wifi, but devices are a bit more expensive.
Amazon and Google are a privacy nightmare. Home Assistant and Domoticz are two wellknown local first smart home systems.
1 to 3 Watt in stand-by mode for s lamp that draws somewhere between 7 and 15 Watt when on. That's roughly like leaving the lamp on for at least on hour and half each day when nobody is home in the best case.
I have an old wifi yeelight, measured it now because I was interested. 1.4W off, 8.4W full power
For comparison, Ikea zigbee bulb 9.3W max power, less than 0.1 W while off, but switches on instantly. My watt meter can't measure less than 0.1W so it shows 0.0W.
Zigbee was designed for this kind of usage. I have several zigbee sensors running on 3.3V coin cell batteries, they can report data for years without battery replacement.