I currently have an Exposure Enduro that has served me very well for the last 5 years. It has been used twice a day throughout the winter for commuting and for night rides the rest of the year. Battery life is starting to become a problem though on longer rides but its fine for commuting as I can charge it daily if I need too. I have had a Google for new battery prices but for a bit more than the cost of a battery change (admittedly I have only got rough prices) I can get a new light.
I have read hundreds of peoples good experiences but I'm not interested in cheap Chinese after seeing a few failures, a few flickering ones and watching some batteries and a charger explode and set fire to a colleagues rucksack.
I don't really want to spend exposure money again as it seems unnecessary when looking at outputs vs quality vs cost of some of the other units on the market. Also nothing takes my fancy in the helmet mountable range as the burn times and outputs don't seem great although they are self contained units which is a big plus.
My current favourite choice is the new 1500 lumen Gloworm X2. It seems to fit all the requirements I have but am wondering if there are any alternatives for a similar price.
One of the major selling points e of the Gloworm X2 for me (based on the mtbr test of the last model) is the fact that the lumen output is a tested real figure not a theoretical maximum.