Just got my X6 about 20 mins ago in ss/cu neutral white. The output seemed a bit less than expected. When I activate turbo it goes white for a split second, then turns almost a deep blue. I’m using an imr cell, and the X5 with a non-imr cell is definitely brighter. What should I do? I took a video, but it doesn’t show much. I’m guessing it’s a faulty LED or improper heatsinking.
Bad heat path. Either the center pad isn’t properly soldered or the mcpcb isn’t secured to the heat sink.
Don’t keep turning it on. That blue is the underlying driving wavelength — so overbright it’s coming right through the phosphor layer. It’ll burn out quickly.
Note to QC: “it lights up” is not sufficient.
I don’t think it is blue because it is overly bright, it’s blue because the led is getting too hot, did you unscrew the bezel and the reflector and check to see if the mcpcb is tightly screwed down to the copper heatsink area?
Sometimes there are little rough edges on the mcpcb that prevent the base from having good contact with the shelf underneath. You definitely have an overheating led, as said above don’t keep running it like that or it’ll turn even more blue, then die completely.
If it isn’t a problem between the mcpcb and the heatsink shelf below it, it’s that the led isn’t thermally connected to the mcpcb itself. This would require reflowing the led to the mcpcb.
You’d have to desolder the leads from the mcpcb and remove it, then look at it sideways. If the led is tilted or up higher than it should be there may be very little heat transfer between it and the mcpcb. There are many threads about different ways to reflow, but being that it’s a manufacturer defect you have the option of PM’ing Neal or going through the website to see how it could be rectified.
Good luck, let us know what ends up happening.
Definitely faulty LED, opened it up. The led looked kind of flaky. Tried to lightly wipe it with a q-tip and part of the yellow came off.(What ever it’s called) I didn’t run it long at all with the LED blue. I’ve seen LED’s die before from overheating. Guess I’ll get in contact with BG. I really don’t wanna have to deal with returning it.
The yellow stuff that came off is the phosphor layer — the “fluorescent” part of the LED — the magic mix of chemicals that glow at various wavelengths so the whole thing appears to be glowing some variation on white when the blue light from underneath stimulates the phosphor(s). (This is why when you look at the spectrum emitted by a LED you see a big spike in the blue range, even of “warm white” emitters.
In addition to what hank said, the phosphor would not normally come off. I don’t think your led itself was faulty, it was the lack of a thermal path to pull heat away from it that caused it to overheat and cause the phosphor to come loose.
Regardless, it’s a manufacturer defect, but not in the led itself rather the installation of it to the mcpcb or the mcpcb to the heatsink. I would guess the former, the little copper stars do a pretty good job by themselves for a few seconds, it seemed that your led turned blue very quickly so I’m guessing it wasn’t flowed to the mcpcb properly.
As soon as I put it in turbo, when I first powered it, it turned blue. I’m sure each time I left it in turbo was less than 5 seconds. I’m guessing the LED was damaged during assembly. Of course I could be wrong. You guys know better than me. Lets see how banggood deals with it. Hopefully they don’t bang me good.
Just contact Banggood via pm….do not use normal CS…I’m sure they will not have any issue sending you a new emitter with mcpcb.
That sounds right to me. The phosphor gets so hot it doesn’t do its job and the junction’s own wave length shows through.
How do I contact bg via pm? Like on BLF or what? Contacting them through the site doesn’t seem to be working out too well. Took them a week to reply and gave me some bs about how it’s working 90% correctly so they’ll just give me 500 points. Don’t even know what that’s worth. I doubt very much.
PM Banggood here in BLF. His name is Neal. :)
Best Regards,
George
He needs a link to a post from Neal in order to send him a pm. The user list is no more.
No, he doesn’t. He goes to Private messages => Write new message, then enters Banggood in the “To” field & it will autofill recipient. 
Look what I just got in the mail. I’m just a tad heated. 
Wait, so they sent you that instead of a new led?
I asked for the complete internals. Since I don’t want to change the led myself. They said that was the most expensive part and didn’t want to send it. But then they said, ok we’ll send you a new head. I swear they’re playing stupid. Trying to scam me. I hate going back and fourth with these guys. They’ll probably ask me for a video of it next. I requested a completely new flashlight to avoid this happening again.
I messaged Neal again too. Let’s see if he helps.
What was the outcome of this? :?:
Finally received a new head about a week ago. Seems to work fine. I guess it’s settled after 2 months of bs. The flashlight is great. Just wish the service was a bit better.