I received my LED bulbs last week and was very impressed with the quality. I was curious about the circuitry so I reverse-engineered them and tested them, measuring the current flow. Having designed and built numerous LED systems used in aerospace and photochemistry research for over 10 years, I was worried about power dissipation and over-heating. These bulbs are well designed, well within the specs of the components at 12 V. I'm not sure at what voltage my car's charging system regulates, but even at 13,8 V the limits aren't exceeded. I was planning on making my own LED bulbs but at this price, it's really not worth it. I like how they throw light to the sides - nice design! These are a great value and I can't wait to install them in my 911.
Here are two photos. The first one shows the total current flow (39 mA). A 2W bulb draws 167 mA and produces much less light!
The second photo shows the bulb as it's turning on, at low voltage. An image at 12 V would totally saturate the camera.
Thanks for these bulbs, Englebert!
