As said in another post speleotechnics were very cutting edge at the time.
I bought an FX5 with charger in 1995 costing me 200 hard earned but the light output compared to an oldham/FX2 was outrageously bright.
I'm still using it now and am getting 4 hours out of the 10w bulb which is same as from new.
The guys retiring and full respect to him.
rockster.