3 ms·
Heaters don't care. Zero effect. High power ~300W AC/DC conversion is 90% efficient. Low power ~1W AC/DC conversion is typically 65% efficient, but the energ
by nabla9 3y ago
Heaters don't care. Zero effect.
High power ~300W AC/DC conversion is 90% efficient.
Low power ~1W AC/DC conversion is typically 65% efficient, but the energy used is also very small.
- naasking 3y agoVery small but arguably 10x-100x more numerous, so it's not negligible. Especially once you start accounting for the spread of LED lighting.
- nabla9 3y agoNot negligible, but small. Lighting is roughly 9 percent of home electricity usage, TV and Media Equipment: 4 percent.
- amluto 3y agoLED lighting almost invariably wants constant current DC, so there’s a conversion stage regardless. The only major sort-of exception is LED tape, which uses a constant voltage supply, but internally, and lossily, regulates current. A modern high-quality LED light bulb uses a little IC that controls a non-isolated switching converter. You can find excellent datasheets online.