Talk About the Latest in Home Automation/Home Electronics -
Home Automation Forum

Smarthome Forum
Insteon Home Automation
Login or Register
Home | Profile | Register | Active Topics | Search | FAQ | Smarthome | Security and Privacy
 All Forums
 General Discussion
 LEDs with 2 wire switch
 New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

Starting Member

12 Posts

Posted - 10/03/2017 :  11:16:19 AM  Show Profile  Reply with Quote
Reading through the comments on the 2 wire switch reviews, someone claimed that they were able to get LEDs to work fine by adding a incandescent night light or something like that.

Anyone have a clue what that means and whether it is legitimate?

Starting Member

12 Posts

Posted - 10/03/2017 :  11:55:15 AM  Show Profile  Reply with Quote
Quoted from the comments...

For those who have trouble getting it to work with LED lights (ie. flashing issues, flickering, not going completely off, cycling, etc.), you can add a small 4W incandescent night light (manual switching, not photoLED switched) to the switch and it will work properly.
Go to Top of Page


10615 Posts

Posted - 10/03/2017 :  12:43:36 PM  Show Profile  Reply with Quote
There are two circumstances where adding an incandescent load will help an LED load.

For older, plug-in modules, LED bulbs can glow faintly or flicker in reaction to the load sensing circuitry that enables toggling a lamp’s built-in switch to turn the module on. In that instance, a tiny incandescent load (like the night light) will absorb the sense voltage without lighting the bulb.

The situation is different on a model 2474 2-wire switch. The reason that switch lists a minimum load size is, it plays a trick to obtain operating power. It actually completes the circuit even when the switch is off in order to siphon off enough power to operate. In that case, the load has to be large enough that the switch can run enough power through it to siphon some off, but at the same time it has to limit the current sufficiently that the bulb doesn’t turn on. For that to work, you’ll need more than 4 watts of load.

In reality, the 2 wire switch is a pretty big compromise—it requires a specific minimum load, it stresses the load by running a constant flow of electricity through it even when ‘off’, it stops responding entirely when the load burns out, and it is single-band RF because it doesn’t have unobstructed access to full line voltage.

For those reasons, I prefer to use standard 2477 switches and either run new wire or link to a fixture-mounted micro module when a location lacks neutral wiring.

Volunteer Moderator & Home Automation Enthusiast
Go to Top of Page

Advanced Member

5769 Posts

Posted - 10/03/2017 :  3:24:00 PM  Show Profile  Reply with Quote
The specification say Incandescent Load only.
As pointed out. It gets power through the Load.
Using a small incandescent bulb with the Dimmable LED bulbs may work but you may get unexpected results. Non Dimmable LED bulbs should not even be tried.
Also it can not be used in any multi way setups.
Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
Smarthome Forum © 2000-2018 Smartlabs, Inc Go To Top Of Page
Powered By: Snitz Forums 2000 Version 3.4.07