3 ms·
Are there any dimmable LED strips that operate by fully illuminating X% of the LEDs? As opposed to time-slicing all the LEDs. I don’t know enough about hardware
by iainmerrick 8y ago
Are there any dimmable LED strips that operate by fully illuminating X% of the LEDs? As opposed to time-slicing all the LEDs. I don’t know enough about hardware to know if that would be feasible.
The flickering and whining is pretty bad in all the dimmable LED bulbs I’ve used (but I haven’t yet looked hard for high-end ones).
- dbuder 8y agoFor long life, LEDs need to be off some of the time, better to run at 20mA 50% of the time than 10mA 100% of the time. That always on warning light on your cheap electronics runs at low power and has a relatively high failure rate. You need to tune or shield the drive to avoid troublesome EMI.
- thatcat 8y agoYea, my desk lamp does that.
- OnlineCourage 8y agoThat severly shortens the lifetime of an LED, like by a factor of 10. So I would guess it is not common because much of the benefit that gets marketed is the longer lifetime. It is possible to build a better dimmer switch which actually works across the full profile of voltage variation but the problem then is you have to pay an engineer money and why do that when you can spend money on booze and dinners to win more sales contracts with your lighting distributors and get a higher ROI? The lighting world is a very consolidated place.