robert Posted June 15, 2019 Posted June 15, 2019 Last year I bought led grow lights (1000W) and one went white with a few greens. When the timer went off, it still had red and a few greens in very low wattage, but on. I have a manual timer and a digital timer and the power went through both. How can this led light suck power through the timers when off?
mwester Posted June 15, 2019 Posted June 15, 2019 Because for many devices that use solid-state relays or semiconductors to control the power, off is really "mostly off" -- there's always some leakage, and LEDs require so little power that some of them may glow on just the leakage current. For some relay-based units where "off" really should be "off", the manufacturer has put in a "sense" circuit to detect when the user turns on the plugged-in device using it's on/off switch -- these "sense" circuits put a small current on the line to do this, and that current is enough to make some low-power devices like LEDs glow as well.
robert Posted June 15, 2019 Author Posted June 15, 2019 Thank you for verifying that electricity is a theory and not finite. I never played with electricity, but my older brother is a genius playing with electricity and he always said it was only a theory that we can control. It is NOT finite.
Brian H Posted June 15, 2019 Posted June 15, 2019 I have also seen the 2456S3 V4 revision Appliance Linc also have a Snubber network across the relay contacts. For some protection. It also conducts a small amount of current when off. It added to the small Local Control Sensing Current. Causing low current LED bulbs to glow.
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