LED Dimming Issues - R30

[KP2]

Hi everyone, I was wodering if anyone else is having dimming issues with LED R-30 15 watt screw in LED lamps.

When we install more than 10 on a circuit we loose the dimming capabilities.

Any input would be greatly appreciated.

Thanks in advance.

Kevin

 

[Dennis Alwon]

Are you using the appropriate dimmer? AND yes I have heard of many issues with dimming LED even with philips bulbs and the LED Lutron Dimmers.

 

[KP2]

Thanks for the quick respons, and Yes we are using Lutron Diva C.L with the trim dial.

We have found that they work when we have 2 to 10 lamps on a circuit. so we need to split up the circuits. This extra cost has not gone over well when the customer has spent good money on LED's.:happysad:

 

[ELA]

If the lamps have been confirmed to be compatible with the dimmer ( Lutron offers a compatibility list) then:

It could be a repetitive Inrush current limitation. This is something fairly new with CFLs and LED lamps that are being dimmed.

Here is a reference where they talk about the maximum number of lamps that can be used with dimmers:

http://www.lutron.com/TechnicalDocumentLibrary/Wattage%20calculation.pdf

 

[KP2]

We are using LED lamps that are on the list, and if we are have ing these issues still, do you think putting in a SCR may help, like used on VFD's.

I may have the wrong component or application in mind, I remeber reading a post a few years back about using SCR's.

 

[ELA]

The document I linked says 10 (15 Watt LEDs) are max on the 600 Watt dimmer.

 

[KP2]

You know what, I missed the dimmer rating being reduced to 150 Watts for LED, these retro projects are going to get expensive.

We are having trouble with just 2 lamps, as well, growing pains; right.

Thanks again everyone
Kevin