The 808, being the most well known - is a clone of the Lupine Tesla.
But there is now, a clone of the clone... DX sell it, its P7 based, same battery pack, same format and it costs £30. There are even alternative LED versions other than the P7 which are slightly more efficent. XML-T6 etc.
Sometimes the downside with these cheap lights and torches is the finishing isn't always that great. You really need to pop them open and check the solder joints, threads and thermal grease. So you have to be ready to sort out any issues yourself, but its certainly not hard.
I would never trust one of these on their own, but then again I wouldn't trust a big branded light either. A warranty does nothing for you on the side of the road.
Remember that when not moving these get very hot on the outside - being hot on the outside is good as it shows there is a good thermal path from the LED to the body, thus its being cooled.
As with the 808 above, also look at SKUs 82507-82510 and 82734.
Magicshine also have a 872 and 870 which are 4 and 3 LED lights and "1600" and "1200" lumens - £97 for the top one from china.
http://www.dealextreme.com/p/mj-872...te-led-bike-light-with-battery-pack-set-80953
and
http://www.dealextreme.com/p/mj-870...te-led-bike-light-with-battery-pack-set-80954
Yes 1600 and 1200 lumens are unlikely, and so is 900. But its a rough comparison between lights.
Like some others I also have the 818 rear light, which is lovely - if not a bit overkill
