deanwil wrote

Everything that goes into a mine has to pass the explosion proof test
requirements. LEDs can pass, but it has to be in a tested design.
That adds cost...

True, but that seems like a good product that needs to be developed.

If it were me, I would want 3 - 3 watt LED's, in a head lamp with the
typical wire going to a belt battery pack with 6 or 7 C-NiMH cells. Two
switches, or one three position switch - one to light only one LED, and one
to light all three. That has to be a lot more light than what ever they are
using.

It sounds like a product to develop, wouldn't you think? It would be a
piece of cake for you.
--
Jim in NC