Focus assist...IR?

[SidewinderINC]

So, I've been doing a few gigs now (yes, mostly my sisters ones but you've gotta start somewhere and get practise) and I'm finding focussing is my biggest issue with the low light.

I know that on flash units, and some flash triggers you get focus assist beams that claim to be IR, which seem to be mostly just red light.

Please correct me if I'm being completely stupid about this, and tell me that this wouldn't work at all BUT..

If I were to get an actual IR lightsource, would that work to help focussing?
Something like an IR Krill Lamp.


If the way the focus assist works is completely different I'd love to know and be set correctly.


Thanks muchly