Review: XTAR S1 (3 x XM-L U2, magnetic ring selector, 30 - 2800 lumens ANSI)

[HKJ]

@2100

I am not sure if i understand the word direct drive correctly. With DD that it means the light is directly driven by the cell right? It could be direct hardwire, it could go through a driver’s electronics but basically in DD mode the driver does not limit nothing. This is my understanding.

But if there is a resistor in there or a driver which limits the current, then it is not direct drive though it could be unregulated (seperate matter). This is because in the CPF reviews, the direct drive is mentioned multiple times. Maybe it's coz i have been doing playing with too many DRY 3 x XM-L, now that's DD. heh... (ok so the latest driver is still 90% PWM in Turbo). Perhaps i am wrong and the correct info is something that i can learn too.

The light is definitely not direct drive, it is more like a 7135 driver as can be seen on the voltage sweeps curves in my review.