I recently picked up a Philips EnduraLED dimmable LED Bulb. 12 watt 60 watt equivalent.
I have started doing some tests with the bulb.
It is kind of a strange bulb. It has yellow pieces around the outside and bright Blue LEDs inside.
The Yellow plastic pieces glow White when hit by the Blue LEDs.
http://www.edn.com/blog/PowerSource/40512-Remote_Phosphors_Philips_LED_bulb_Tear_down_Part_II.phpPreliminary tests show it works fine with an older Date Code 02K45 WS12A wall switch.
No data on a newer soft start with resume dim features.
It does flicker slightly when dimmed all the way down but will not go 100% off. It will go Off when the WS12A is sent an Off command.
Adding a 40 watt bulb, that is the minimum wattage rating for a WS12A and it still did not dim to 0%.
LM465s also where slightly strange. Both Old and Soft Start versions did not dim to 0% even with a 40 watt bulb also on the load.
Soft start ones don't dim to 0% even with incandescent loads.
More tests to follow