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Comment by __turbobrew__ | Hacker News Reader

I wonder how much it would cost to put an gps receiver in every lightbulb? If you can get a gps signal you can get a rough guesstimate of the bulbs location and time and therefore adjust to fit the local circadian rhythm.

Or maybe you could sync to a local radio time station?

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Too much still, also usually no GNSS reception in the usual bulb locations, except maybe for those wooden cardboard houses everywhere in the US (:

Those radio time services over AM/FM better and cheaper for thst.

both GPS and radio time receivers are very expensive. LED bulbs are a commodity product and thus have little room for margin.

Our low power clock + super cap added $1.25 of BOM which translates to $2.50-$3 of cost to the user.

Led bulbs at Home Depot are $3-5 on the low end.

I would easily pay 30+ USD per bulb if it had time-sync and NO internet connection (LAN optional and not a must-have).

Actually I already did. LIFX day night bulbs cost more than that and don't have the functionality that you had in your product out of the box.

Actually personally I would pay as much as 50 USD per bulb for standalone bulbs that just follow a cycle pre-set by myself over BLE or wifi or even a freaking USB port :p

Maybe they exist but I haven't been able to find them.

$2-3 but GPS antenna is pretty bulky so forget it.

Local radio time is generally iffy if you can't afford bigger antenna. Syncing my watch is basically impossible indoors, althought you might be able to get a bit bigger antenna in a bulb... but they will also be in much worse locations (near walls and inside metal enclosures)

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