A single 12V LED bulb cannot be charged directly on a 36V lithium battery. Generally speaking, three bulbs need to be connected in series. However, due to individual differences between bulbs, they may not be exactly the same. This will cause differences in voltage distribution. Some may be lighter and some may be darker which will affect the life of the bulb.
Can 36V lithium battery be used with 12V LED bulb?
Introduction Can 12V LED bulbs be used with 36V lithium batteries? A single 12V LED bulb cannot be charged directly to a 36V lithium battery. Generally speaking, three should be connected in series.