Dimmers with direct manual control

Dimmers with direct manual control had a limit on the speed they could be varied at but this issue has been largely eliminated with modern digital units (although very fast changes in brightness may still be avoided for other reasons like lamp life).
Some dimmers are built with potentiometers or variable resistors because they have higher efficiency. A variable resistor would dissipate power by heat
(efficiency as low as 0.5). By switching on and off, theoretically a silicon-controlled rectifier dimmer does not heat up (efficiency close to 1.0).

ผลลัพธ์ (อังกฤษ) 2:

Dimmers with Direct Manual Control had a Limit on the speed they could be varied at but this Issue has been largely eliminated with Modern Digital Units (Although very fast changes in brightness May still be avoided for Other reasons like Lamp Life).
Some dimmers are built. with potentiometers or variable resistors because they have higher efficiency. A Variable Resistor Power would dissipate by heat
(efficiency as low as 0.5). By switching on and off, theoretically a silicon-controlled rectifier dimmer does not heat up (efficiency close to 1.0).