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Old 04-01-2016, 03:15 PM   #1
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Question Dimming LED Lights

Has anyone found weird things happening (strobing, flashing) when you start dimming various area's of LED lights?

We just finished a wine/liquor store, where virtually all various lights are of the LED type. Each different style of light fixture (pendants, pots, cove tape lights) are on separate LED dimmers. When dimming one type of lights, we are finding OTHER types of LED lights start strobing/flashing!!! In other words, when we start dimming the pots, the pendants will flash, or visa versa!!!

Does anyone know about this? Fixing it?

Last edited by power; 04-01-2016 at 03:19 PM. Reason: typing error x 3
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Old 04-01-2016, 03:35 PM   #2
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Are these on multiwire branch circuit's? I wonder if that is the reason
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Old 04-01-2016, 04:01 PM   #3
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Its interesting you asked that....one of our guys was wondering the same thing!

We are using the same branch circuit to feed various different types of lights, yes. Too, the neutral is shared among A, B and C phases (as it typically is).

Your thinking maybe these LED dimmers produce "dirty" power, and potentially are polluting the signal to the other dimmers causing them to react unfavorably?

Last edited by power; 04-01-2016 at 04:02 PM. Reason: typo
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Old 04-01-2016, 04:08 PM   #4
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The common netrual can wreck hovac on dimming system as you did see it..

The only soluation is run it own hot / netural for each circuit...

I done that route when a customer mention dimmer on MWBC so just run like a single circuit..

And try to keep on the same phase if you can that generally advoid flickering / strobe action...
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Old 04-01-2016, 05:51 PM   #5
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Ok, thanks frenchelectrician. I appreciate your input! Much Thanks!
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Old 04-01-2016, 06:48 PM   #6
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The dimming LEDs i have installed require a particular dimmer that has additional + & - dc leads that tie to the LEDs power supply along with the line voltage hot and neutral.
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Old 04-01-2016, 07:31 PM   #7
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Quote:
Originally Posted by Buttonwoodworks View Post
The dimming LEDs i have installed require a particular dimmer that has additional + & - dc leads that tie to the LEDs power supply along with the line voltage hot and neutral.
0-10v dimming
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Old 04-01-2016, 07:34 PM   #8
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Quote:
Originally Posted by Buttonwoodworks View Post
The dimming LEDs i have installed require a particular dimmer that has additional + & - dc leads that tie to the LEDs power supply along with the line voltage hot and neutral.
If my hunch is right that it do requires 0 - 10 Vdc leads for dimming purpose ..
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Old 04-01-2016, 08:06 PM   #9
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604 Is correct.
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