I bought these initial LED to replace a small incandescent bulb in a small flashlight 3V to which I hold. I do not expect a miracle but I have noted with joy that the light produced by the small LED was more intense than the conventional bulb (3mm too)! I imagine that consumption will be greatly reduced and thus the life of the well increased battery. This is a small emergency light in case of power failure. The housing bubble has arrived in China faster than expected (12 days for a previous order on a Sunday) I have not counted the number of LEDs but they are numerous! Quality / price ratio I am very satisfied with my purchase.