Here is my review of the Magicshine MJ-870 & MJ-872 (both from DX).
It is a short version for full version click here : =>
Magicshine MJ-870 and MJ-872 - magic 1000+ lumens from 3 and 4 Cree XP-G leds. 
Some marketing data.
Close up :
A bit closer
Very close...
Total show off :
How does it light ?
Assuming that I did not get jumbled up during the measurements and that the Chinese did not insert there the possible worst Cree XP-G leds, but only the most popular R4, in theory, on the leds, you should get 1400 and 1050 lumens so that, in both cases, the lights exceed the magic limit of 1000 lumens. However, frankly, if you add circa 10% loss across the optics, you will have 1250 and 950 only but this is still a lot of light :thumbsup:. Well, of course, the weakest mode has 20% instead of 30, but the Chinese light users have got used to such trifles already :madman:.
Magicshine MJ-808 - SSC P7 (high ca. 600 lumens)
Magicshine MJ-808E Cree XM-L (high, ca. 750 lumens)
Magicshine MJ-870 - high (
100%, ca. 950 lumens)
Magicshine MJ-872 - high (
100%, ca. 1250 lumens)
Resume.
The new lights, the new quality, a lot of light. I tested MJ-872 in a fight, arranging and winding up the route of the night competition for orientation; the 300+ lumens on the low mode were completely enough for me to move on broken-stone roads; I switched on the maximum mode once, perhaps most probably in order to see how it would be
. What does it give in practice ? On the single battery pack, you may ride for 10 hours !. The optics of the distribution angle circa 20* illuminates ideally the road before the bike. To put into words simply, after the tests, the 4-unit stays with me (after replacement of the cables, thermo paste, lubricating of all gaskets and threads with silicone grease and accurate tightening; at last, its Chinese stuff
).
