defloyd77
Flashlight Enthusiast
My understanding is Nichia's x19 LEDs, 219, 319, 519, etc., are for lower voltages, the first number designates size. You can't have a 7V 1000Lm 219b. It will fry on the boost circuit of Liion, though can be direct drive on Liion.
The 719A is 6.76V fwiw.