A very useful project of a 12V LED Lamp circuit. This led circuit is very simple consist of 5 resistors and 15 super bright white 5mm LEDs which are easily available now a days on very cheap prices. You can use any type of 12 volt battery with this circuit. You can also use this lamp circuit with
car battery. The circuit is tested with 4.5AH lead acid battery and it served for several days as emergency light circuit and gave a very long back up with only 4.5AH lead acid battery. After countinous operation of 2 to 3 hours daily for several days the battery showed 9 volts on digital multimeter meter.