From the sublime to the ridiculous.
Comments
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They use PWM ( Pulse Width Modulation ) all that means is they switch the power on and off very quickly. The brighter you set them the more ON they have. As you turn them down they have less ON. Your eyesight does not see it as it's very quick. Circuit will use some power but LED's will use less.
Some of the new Cree LED's are down in the mA range so use far less power.
Our MH has touch control lights. Touch them once and they come on a nice blue colour touch them again and they turn white. We also have a large number of LED Lights
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Yep they FLASH but you cannot see it because as the light dims it is switched on again. We are talking micro seconds. Far to quick for the eye to see
So to dim the bulb they decrease the time it is ON. They don't increase the time it's OFF. If you did that you would see it flashing.
So one cycle is say 10ms .. 1ms ON and 9ms OFF will be dim but 8ms ON and 1ms OFF will be bright.
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Yep they FLASH but you cannot see it because as the light dims it is switched on again. We are talking micro seconds. Far to quick for the eye to see
So to dim the bulb they decrease the time it is ON. They don't increase the time it's OFF. If you did that you would see it flashing.
So one cycle is say 10ms .. 1ms ON and 9ms OFF will be dim but 8ms ON and 1ms OFF will be bright.
Might that explain why on my dash cam cars with LED daylight running lights seem to flash rather than a steady illumination. Sorry to go a bit OT but just interested.
David
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I must be living in the dark ages... my van only has 7 2Watt LED lights and that's more than sufficient. I rarely have more than 3 switched on at any one time.
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