I bought some green & yellow prewired leds on ebay to use as switch indicator lights. I found them to be way to bright. The leds are powered by a 9v DC power supply with a 960 ohm resister on each led. I thought this would dim them a tad but no luck it didn't help a bit. I bought some from Radio Shack years ago that are perfect for this purpose. I wish I would have bought more now.