Waterproof flashlight powered by one unprotected 18650 and a compact LED lighting bulb powered by one LED bulb. For this project I developed an easy 230V LED driver circuit which will control LEDs directly from the most power supply. Now I will be able to design my very own driver circuit for MCPCB DC 12V LED bulb which may run on 220 VAC. I used three SST40 NW LEDs and drive one strand of LEDs with a voltage between 5V and 40V. This chip depends on the voltage that's emitted to the LEDs. they will reach up to 10,000 lumens of wonderful performance with one 21700 battery and it is often easily incorporated into any lighting system. If you would like your LEDs to be very bright, you've got to simply accept that, but if you would like them, you ought to keep them running at a heat, which makes them less reliable. it's good to understand that the efficiency increases once you run more electricity through the LEDs and therefore the higher the temperature, the more heat it'