How about a true example. Surefire LX2 ($150) vs 4Sevens QB2L ($62)
LED: The QB2L wins here as it has the latest CREE LED, where the current LX2 lights are two generations older. But both have high quality LED's, but the LED in the QB2L is a little more expensive.
Light Output: This one is a little tricky. The QB2L has more light output, but the LX2 has a far superior lens and reflector(TIR). Therefore the 200 lumens of the LX2 will seem light a lot more than what it really is. The beam pattern is much nicer on the Surefire. The TIR set up is not cheap and is a major factor in the increased cost.
Body: The Surefire has a little heavier aluminum than the 4Sevens light. The fit and finish is also nicer on the Surefire. This also increases the cost of the light
Switch: the switch quality of Surefire lights are nice. They just feel like they would last forever. The 4Sevens switches are nicer than most, but still not as nice as a Surefire. Again, this cost more to make.
Very good information here!
I will add one more to this:
hog hunting lights, feeder lights, blood trailing aids
Elusive Wildlife Technologies
We use the XLR-250, $139.99 for a complete package with charger, gun mounting brackets, wall and vehicle adapter, pressure switch end cap, and two rechargeable batteries (one battery is equivilent to two CR123 and the unit only requires one battery at a time). We have had the same flashlights for over four years. Same flashlights still using the same batteries that came with the lights and we use the lights ALL the time. One stays mounted on a rifle for after dark use and it is cycled everynight. The two handhelds are used almost daily as well.
Coating is wearing very well! Ours are the older CREE and I want to say it is putting out about 700 lumens. We can easily see out 200 to 250 yards just as advertised. The light is very concentrated in the center and does not bleed to the sides. We use red lights and green.
Want to spend a little less? For $99.99 the XLR100 is 350 lumens for a complete package as described above.