If you want to replace the light bulb of ordinary flashlight with LED, how to choose LED?

Choosing the LED of flashlight is not a problem. Theoretically, all flashlights driven by 1 or 2 batteries of No.5 or No.7 can use 1-3W LED, as long as the appropriate driving circuit and lamp cup are selected. CREE with small core is usually used? R5？ XPG？ LED is better, the theoretical maximum is 350 lumens, with high brightness, high light efficiency and not too much heat, so it is more suitable for pocket flashlight.

Circuit driver can choose 1.5V (single battery No.5 or No.7) or 1-4.2V( 1-3 batteries No.5 or No.7).

I do titanium lighting for flashlights. At present, flashlights with strong irradiation effect are mainly equipped with 800 lumens single chip CREE? XML？ T6？ LED flashlight C 10 is the first choice for outdoor and night riding, with wide light intensity in short and medium distance, good long-distance focusing and excellent road lighting effect. With T6? 18650 LED is small and straight, small in size, super bright, and can communicate.