I am surprised no one else has responded with comments about using these specific LEDs?
At $4 a pop, they should provide specs on brightness...and show side-by-side photos with the corresponding incandescent bulb at the same voltage. 
I was next going to suggest just waiting for another polarity-insensitive LED supplier to come along but glanced at their Patent and before my eyes glazed over I noticed a bridge rectifier front-and-center as their solution to the polarity issue. Google search also brings up a patent lawsuit against another LED supplier...so perhaps this is keeping others away.
So if one has to pony up $8 (2 bulbs) for a traditional controller, I wonder if someone makes a replacement controller that uses LEDs? For every thread about replacing controller lamps with LEDs, it seems there's one asking about replacing the bulky controller assembly itself with a compact momentary toggle. It's amusing how a "modern" controller might internally use a compact momentary toggle while retaining the traditional exterior look-and-feel!
