FeiLong FL XML 4000- Mtbr.com
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  1. #1
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    New question here. FeiLong FL XML 4000

    Anyone know about this lamp? Apparently has a built-in fan on thermostat. Kaidomain shows it with optics but lists reflectors (same mistake they made on the Butterfly, since corrected.) Appears with U3 designation and reflectors at LM and AE with slighltly different lamp body and model number of C60-4 printed on it. Weird thing is, all sites show the 6 cell, 12.6V battery pack with twin leads, though the lamp itself has just one connector. Perhaps it can be operated while charging? Battery pouch is camouflage, can't figure that one out either. Charger port splined much like MagicShine's, no wall wart. From KD beam shot, the White XM-L U2 appears pretty neutral, at least there's no discernable blue tint. Of course, would prefer NW XM-L2 myself, but this lamp hails from 2013... Be nice if it got an update.

    Attached Thumbnails Attached Thumbnails FeiLong FL XML 4000-image.jpg  

    Last edited by andychrist; 02-14-2015 at 08:26 AM.

  2. #2
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    I suspect in rainy conditions it would have problems. But in places where it is hot all the time, the added fan could keep it from overheating.

  3. #3
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    I don't think the internals of the lamp are exposed to the outside, only the fan. The fan looks to be blowing on an external finned heat sink. Not sure what happens when the fan gets wet but it looks as though it only comes on in a certain mode.

    The real question is, "Is this lamp really outputting 4000 lumen"? If it is this could be interesting. I hate the look of the mount and too bad it isn't using the newer XM-L2's.

    Anyway, 4000 lumen for bike use really is a bit too much. Likely the run time is very short and with the fan running even shorter. Motors eat amp hours for lunch.

  4. #4
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    Well according to the manufacturer, lamp is waterproof down to one meter. In which circumstance, that fan shouldn't be coming on anyway. But yeah, even with its 6-cell battery pack, run time is only estimated at one hour — motor probably consumes even more juice than the LEDs! Perhaps though the fan doesn't have to kick in so much when the whole unit is in motion (has both thermal sensitivity and variable speed.) Still, assume the whole métier of this lamp is its specific ability to keep running at full power without having to rely on a surrounding air current. So could be useful in a variety of applications, especially if operational while charging. Hmm, as it's rated 12.6V, wonder if the FeiLong could be connected to a hub dynamo? Too bad it doesn't have stepless dimming or the more efficient XM-L2, otherwise I'd be tempted by those 4X optics and relatively compact design. Might have made a nice alternative to the SS XT-40. Oh well, already ordered that four eyed Mothra monster, which am hoping will have good enough passive thermal management and make an easy upgrade to NW should the need present itself.

    In the meantime, am volunteering MK96 as the guinea pig on this one. kuzmami, your collection just won't be complete without it!

  5. #5
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    Wow, that is some output. What kind of batteries are you going pair to it.

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