The H502 can be used as a flashlight, using your thumb on the button on top, like a right-angle flashlight would work.
I have read some anecdotal reports that it seemed as bright with an L91 as another full-flood flashlight by Peak that was around 300 lumens.
The problem is that the beam is so widely dispersed that it goes beyond what is normally considered "flood", and therefore there is very very short distance of "throw", measured in a matter of a few yards. It is an extremely short distance light that just spreads its large amount of lumens over such a wide area that it doesn't go very far at all, and the brightness level is very minimal all over.
I was interested in this light, but I'm concerned that it is too specialized as a very short range personal task light that isn't well suited for hardly anything else.
I would recommend having a personal audition with this light in person, so you can see exactly what it does, and if it is right for you.