Admittedly, I was looking for something like these for modding.

But at $18 for 2?? nah. I am not willing paying much more than $2 for one of these.

The another problem of these cheapo lamps is that they use a resistor to “regulate” the currents, and boy these resistor dissipates just as much (if not more) heat than the LEDs itself. :person_facepalming: This drains the extra voltage to the “wrong” place and make the battery life situation even worse.