Used it yesterday on a 7 hour trip and very pleased with it.
The beam is the best I've seen from an LED lamp and is on a par a 6watt halogen Oldham, light output is better than a Nova but much better focussed.
Spill beam is good with your feet been well enough illuminated, you have a reasonably wide beam with a tight centre spot, all round very good light out put.
Pilot beam is not fantastic but you can walk with it, I guess with a designed duration of 500 hours on pilot its not gonna be bright!
The only reservation I had with the lamp is at one point it suffered a little with condensation on the reflector, not a big deal and I suspect it may have been simply because its the 1st time the lamp has been on any length of time and upto working temperature. I will monitor it and see if it occurs again.
The metal casing of the lamp gets warm (not hot) so presumably is acting as the heat sink for the LED
Other lamps compared with yesterday where, Nova, Duo, Oldham GT, Myo, Nife and another Oldham conversion using two 3watt LED's (will look up its name), the onlyone with similar performance was the Oldham conversion thing.
It is only a single 3watt Luxeon but doesn't suffer from lack of light. Will be interesting to directly compare it to the FX5, Stenlight and the Scurion, I suspect one or the other will put out a bit more light but not decively!
Perhaps most importantly of all, its tough, certainly as tough as a traditional Oldham which puts a step ahead of anything else on the market.
Combination of battery endurance, light output and ruggedness, its top of the game. Best underground lamp I've seen to date. Some P4 emitters may be more powerful but thats only a 3rd of the game. Battery endurance and toughness need to be figured in.