LED grow lights

[robert]

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]

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]

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]

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.