Ultrafire 501B UV 365nm Flashlight (1*18650/2*16340) Quick review

http://kaidomain.com/ProductDetails.aspx?ProductId=11095

Receive in two weeks, pretty good timing nowadays..

As the 501B host is over-reviewed the only thing to note is that came with coated lens , all fine, orings , lubed , finish etc... nice first P60 host to play with plenty of spare things around here. Busy weekend at sight.

The dropin look very well made and assembled with the emitter glued onto the pill.

As the pic show has OP reflector .The other is an empty received yesterday aimed at pill for a Mini Maglite Match's easy mod.

Draw 240 ma from an 18650 , that's a bit less than 1W , 800-750mW at the emitter.

Emitter close up..

Below a pic from the 395-400 nm emitter also sell at KD. This one is on a C78 zoom to throw which is perfect and the same host is waited for the 365 one.The stock drivers 1.2V AA powered of those is perfect for this emitter also the heat dissipation could be enough with little to adjust.

http://kaidomain.com/ProductDetails.aspx?ProductId=8813

Below the 365 nm

The pis are taken with plenty of ambience light...

I'm feeling ill because writing as a five years old is tiresome as hell...hahah

Ah, so it's about the same emitter and the same power as my Tank007 TK-566 1W 365nm... :(

Such a pity it isn't a 3W emitter.

Still, a better deal than the tk-566, same power same emitter, 40% less money.

The emitter look exactly as this Taiwan 3W 380 nm .Wonder if can be pushed a little more around 350 ma with a boost driver from an AA light , 1.5W...hope the pic at that site is correct .The Budgeteer's review say 450 ma 1.75W..

http://www.manafont.com/product_info.php/taiwan-3w-380nm-uv-flashlight-dropin-module-42v-max-p-5697

The tank and the taiwan use the same emitter.

There is a 3W version of it in the tank PD30 365nm, which is basically three such emitters under one dome. The flashlight is three times more expensive than the tank tk-566 at almost 100$ (sans customs).

I'm really tempted to try this one out: http://il.mouser.com/Search/ProductDetail.aspx?R=LZ1-10U605virtualkey62410000virtualkey897-LZ110U605

But the price... a little too high for a toy like this. :)

I think it is a 3W emitter or very close if not. I fed it with the power supply beyond 1A with no apparent harm or swift in the output. Never thought that some day I would need a multimeter with back light, this hobby is very demanding .lol

The issue here is the high Vf of this kind of diodes;

200 ma 3.956 Vcc

500 ma 4.345 Vcc 2.1W

700 ma 4.650 Vcc 3.25W

1000 ma 5 V cc 5W

They are very tricky to drive with one cell , being 18650 or 1.5 ones , there are not standard driver to do it well. The linear don't work because the Vf is way more than nominal 3.7...the bucks don't also .

The stock with take 2 16340 do it because strangely is a voltage regulator working as buck driver , with a bit more than 6V work fine..

Probably will work forever at 3W if well cooled as in a RC-G2 host.

Lets see if those boost can led 700 at 4.35 V with a rechargeable ...i have four differents stocks ones to experiment. I¡m a big fan of one cell powered ones..

Well, it's way more difficult than I thought at first.

I was wrong , the stock driver led only around 120 ma with 7.2V two 14500 in series. You can't properly check drivers with the power supply.

The stocks boost drivers one AA' tried give at the most near 200 ma as the buck with 18650.

18650 Vf 3.96 Vrms

14500x2 Vf 3.36 Vrms

P-31 1.2 V Vf 3.69 Vrms

C78 (moded) 1.2 V Vf 3.87 Vrms

C78 2.4V Vf 4.54 Vrms 3W

G10 1.2 V Vf 3.60 Vrms

The emitter was re flowed in a standard 20mm star filed down. To make things worst the case is electrical connected to minus pole ...

Pic below at 3W without reflector.

Ordered one C78 double cell as last option...

The P60 drp-in has now an AK-47 with a actual XR-E R2 , nice beam with the OP reflector.

I couldnt find this light or any mention of it. Can you provide a link? Thanks.

Follow up here;

Sorry, I meant the PT30:

http://www.candlepowerforums.com/vb/showthread.php?311637-Need-help-in-identifying-UV-LED-(advertised-as-Nichia-seems-not-one)&p=3612571&viewfull=1#post3612571

http://www.tank007store.com/products/TANK007-PT30-2%2ACR123-or-1%2A18650%28Li%252dion%29-3W-365nm-UV-flashlight.html

PT30... thanks. The $100 price drew my attention. This would have been a steal if Tank hadnt blatantly lied about the nichia emiter. Also thanks for the CPF link. As stated, "The NCSU033B has a single emitter and a four emitter version is available as NC4U133. Nichia doesn't make these UV LEDs in a three emitter version." Thats all I needed to know. It seems that the 365nm version 501 at Kai is still fairly good for the price and for what you get. I had intended this for aircraft engine inspections when looking for oil leaks. The flood beam of a true quad nichia for $100 just sounded to good to be true.

I've seen many fluorescent lamps (4w or 9w) for very low prices.

Maybe they can help?

I have no idea how strong is their beam, but it's probably much more floody than the LEDs.

Oh, and Tank007 also have a 3W TK-566 version, but I wouldn't count on it to be stronger than the Kai's offering.

It's also expensive, and from what I see it only has two emitters not three (so I wonder how they can call it 3W...). But it would be interesting to compare the KD drop-in with the 556.

?

I never saw a photo of the LED - do you have a link?

Interesting.

I wonder if they also managed to squeeze four emitters into another version... :)

It's quite mysterious how no one knows what this LED is, while it is so ubiquitous.

If only the pictures in alibaba/taobao were of better quality...

Nichia NC4U134 through NC4U134

Product sheet: http://www.nichia.co.jp/en/product/uvled.html

Data sheet: http://www.nichia.co.jp/specification/en/product/led/NC4U133-E.pdf

It looks like the group buy attempt going around the forums never came to fruition.

Considering Nichia is reportedly getting $223 for the quad LED and a custom high voltage driver would be needed to complete the build, this might be a good alternative.

http://cgi.ebay.com/Extreme-Intensity-True-365nm-UV-Ultraviolet-Flashlight-/120719552069?pt=US_Flashlights&hash=item1c1b722e45

Who's going to be the first to buy and review one?

That's for CPF rich guys...

Depends what you want, but 395-400nm isn't as good as 365nm for most purposes. I was interested in the KD drop-in but I got the Tank007 PT30 instead.

I run mine off a 18650. here are some pics I took. it's really had to get accurate representatives since the camera picks up UV. I find that some bills will also show up but not all. The wavelength is too close to visable IMO. I'd like a 365nm emitter, but the good news it the output is pretty good as is. I'd hate to have it driven less. Sorry about the links, I've never been on a site that used HTML for pics [IM59-1.jpg[/IMG]