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RAKC
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Discussion Starter · #1 · (Edited)
As you guys are starting to see, the Bt21 is appearing finally. I was able to help gearbest get set up to carry the light.

Nitefighter BT21 1800LM Cree XM L2 2 LEDs Water-resistant Mountain Bike Lights-15.46 and Free Shipping| GearBest.com

NITEFIGHTER?BICYCLE LIGHT

Update: For ease of finding the main information, I am changing this post to cover initial testing and impressions of the light (plenty of pics!!!)

And time to start the review. DHL was kind and came on a holiday to bring me my light!

First up the case. OMG THE CASE!!!! Quality is GREAT. Very solid, well built, TOP NOTCH. And for me, it feeds my need, MY NEED FOR ORANGE!!!:cool:





All kinds of storage space, enough for second light and pack once you remove gigantic charger. ALso a mesh pouch for storing the small stuff (bands, velcro, whatever else you want to put in it, is got a ton of space too)

Next up parts list:

-Light head: Weight 93g (35ish above yinding for reference), Lumens Id say around 1200 on turbo is my "guess" maybe a bit more but optics make it difficult to judge.

-Charger: 2000mA (yeap 2 amp charger) big solid charger with indicator, very nice.

-Battery pack with pouch: Rubber housing around pack, not cheap thin stuff either. Pouch is dual strap long center velcro tabs to hold pack inside with proper eyelet hole for cable. Uses the nice thick magicshine (available at DX too) 20awg cable. IS true to Capacity (giving margin of error)

-Extension cable, also 20awg MS/DX cable!

-ACTUAL USABLE HELMET MOUNT. Has the rubber type foam on the back, uses 2 long velcro straps for easy use on vented helmets (very excited because sons helmet cant fit an adhesive gopro mount not can my commuting helmet)

-rolled up velcro cable strap (yeap they thought of holding the cables to the frame too, got you covered)

-And Finally, UNDERSTANDABLE and very clear instructions with charts .

Nitefighter thought this one out heavily and I swear spent time reading these forums and learning what we all need. Too bad BT40S kits dont come with all these goodies too.



And WHAT YOU ALL HAVE BEEN WAITING FOR. My "Lab tests" https://ficdn.mtbr.com/images/icons/icon14.png

First up tear down:

Single plate for emitters, can tell by looking at phosphor that these arent 3c, but honestly im kind of liking 4C, think my "winter lights" will be this tint.



This part bummed me out, and DO NOT FOR THE LOVE OF ANYTHING, REMOVE THE SILICONE BUTTON.....Dont ask why I know that, but that shiny center ring around the silicone button is pressed in, holds the button, you arent getting that ring out or getting that button back in... but the driver mounting. 2 screws that sit being the emitters, have a layer of silicone to insulate driver from emitter board contact (if you get brave and try to remove driver which I advise against, make sure to put a new layer of silicone on). Remove the screws, driver doesnt move.....its siliconed in! but no reason to mess with it anyway. Youll see why below.



Also, CAN FIT LEDDNA/GLOWWORM OPTICS, but requires different much thinner oring. Carclo seem to fit right in. OR unless you like to ride in heavy downpours, just take the orings out and put the LEDDNA optics in. they fit TIGHT into face plate so small light rain wont bother it.

Why you can just not even open the light unless you want to change tint or optics:





Ya thats only high not even turbo.

Heres my video review:

https://youtu.be/i7_BTWDrWug
You can find more in depth details of these tests starting on page 8 of this thread.

Summary: LOVE THIS LIGHT, turbo gets HOT!!! but except for guys that really get some speed going, turbo is overkill anyway (heat causes it to not push maximum output for long). Everything it comes with OH YA, WORTH THE MONEY!!!

No im not excited at all. :aureola:
 

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I wonder where they put the driver on this thing. Seems like a pretty small spot underneath the button, unless they take the circuit and split it in multiple parts. Or maybe it's using one of those round flashlight drivers.
 

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Driver is probably FET based, square type with, possibly, 2 boards (but it can be done with one board only).

Yes, the price is for light head only, can't expect a battery pack and a light for 15$
 

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Worst case scenario is that the back side of led board is actually the driver and there's a minimal heat transfer path to those nice looking fins. We will find out soon enough.
 

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RAKC
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Discussion Starter · #9 ·
No im 99.999% sure it uses a flashlight style driver just Below the button or square as Sirius said.

Price i have no clue on, its lighthead only obviously, but till Sunday night my time, I wont have any more info.
 

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But the GoPro mount is clearly made wrong for this lamp. If you rotate it 90° it will be off center. Might still work if the bottom of the BT21 is flat but will look weird.

image.jpg

I asked Andy about the mount as pictured with the BT70 some time ago and he said they were aware of the problem and that it would be resolved when that lamp went into production.
 

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RAKC
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Discussion Starter · #12 ·
Actually being off-center makes me happy, light will sit at more centralized position :p

And they may have fixed it by now. We dont know yet.
 

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RAKC
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Discussion Starter · #15 ·
Ledoman, ill see what's up with that next week. Ive seen them both ways and they call the gorpro one and "adapter" so im hoping it comes with both.

As for amazon, I can't tell you a single thing on that. I simply helped gearbest get them by getting them the info to who they needed to talk to, that was it. So I have NO IDEA but I can guess I would think they still do.
 

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The instructions in the BT21 user manual call for attaching the lamp to the bars with one of the O-rings. Says under Features, GoPro Adapter Included. So it's just an extra, like the wide angle lense that comes with the complete BT40S package. Doubt it would be included with the solo lamp, as none of the other extras are; the plastic mount is standard. Listing on GB says lamp and nothing else.

https://www.nitefighter.com/upload/file/NITEFIGHTER_BT21_USER_MANUAL..jpg
 

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Was curious because it seems like they were supposed to arrive at Amazon about a week ago and no sign of them, plus no mention of it from Andy so I'm assuming whatever was going to end up there is going to hit GB first since it would make sense...
 

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RAKC
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Discussion Starter · #18 ·
And read the details of the light on the site, gopro mount is supposed to be included. I'm gonna be peeved if its not lol. But for $15 can't complain too much hehe.
 

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RAKC
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Discussion Starter · #19 ·
Well did some testing tonight, glad I ordered an adapter to mount my phone for video use, night time video is way better than my ion air. But can't go off road really, phone and adapter mount wont survive that for long lol.

But it'll work for the time being till I can afford a better Sony or gopro.
 

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Video linked above shows full bundle so it is understandable that the gopro mount is included. Now when I think about it, after GB gets the products in stock and updates products images it is more likely to me that the light head (not the bundle) will come with regular magicshine tipe mount only. And that's ok with me, I have just enough space for this light on my handlebar extender. :p

@tigris99. Have you considered xiaomi yi? I don't have 100$ to burn right now but if I did, Yi would be my first & best choice.
 
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