Is there anyone who owned both of this and made a test between this two lights? I'm focusing more on the UV, on Youtube RS20-UV looks better compared to CU6. I prefer someone's experience rather than a youtube video which the camera may or may not pick up the UV rays. I'm new here and thanks for replying guys
Difference with RS20-UV and CU6.
- Thread starter lightryko
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Hi lightryko,
:welcome: I presume you are comparing the Klarus RS20UV vs the NiteCore CU6? These are 2 very different UV lights.
Firstly, it is important to know what you intend to use the UV for?
This will influence the wavelength of the UV as well as the power of the emitter needed for the task.
Important considerations:-
1) Depending on where you get either, the Klarus is about twice to 3x the price of the NiteCore (See point 2)
2) The Klarus RS20UV uses NichiaUV emitters, which probably accounts for the majority of the cost (I might be mistaken, but they do look like Nichia's NCSU033B). - The best quality emitters around as far as UV is concerned. Klarus specs lists it at max 650mW output (though some sites list it at 3W output, which I believe to be erroneous considering the cost of a 3W Nichia UV emitter). NiteCore lists theirs at 3W output.
3) The RS20UV is a primary UV light - uses the said Nichia emitter in the primary, deep reflector. Secondary RGB+white through the side window akin to a mini lantern of sort. The NiteCore CU6 uses double reflector wells housing the UV and XP-G2 with secondary 5mm red/blue LEDs flanking them.
4) Klarus of course has its magnetic in-light recharging in the RS20UV , like its non-UV cousin. Caveat, of course, being that you need to use their proprietary 2600mAh cell to do that.
So there, if you're considering lower output options for off-the-shelf lights, there are others, like the NiteCore P20UV and StreamLight NightCom UV. Another option is P60UV modules.
Hope this helps!
Remember to use eye protection at all times when using UV emitters.
:welcome: I presume you are comparing the Klarus RS20UV vs the NiteCore CU6? These are 2 very different UV lights.
Firstly, it is important to know what you intend to use the UV for?
This will influence the wavelength of the UV as well as the power of the emitter needed for the task.
Important considerations:-
1) Depending on where you get either, the Klarus is about twice to 3x the price of the NiteCore (See point 2)
2) The Klarus RS20UV uses NichiaUV emitters, which probably accounts for the majority of the cost (I might be mistaken, but they do look like Nichia's NCSU033B). - The best quality emitters around as far as UV is concerned. Klarus specs lists it at max 650mW output (though some sites list it at 3W output, which I believe to be erroneous considering the cost of a 3W Nichia UV emitter). NiteCore lists theirs at 3W output.
3) The RS20UV is a primary UV light - uses the said Nichia emitter in the primary, deep reflector. Secondary RGB+white through the side window akin to a mini lantern of sort. The NiteCore CU6 uses double reflector wells housing the UV and XP-G2 with secondary 5mm red/blue LEDs flanking them.
4) Klarus of course has its magnetic in-light recharging in the RS20UV , like its non-UV cousin. Caveat, of course, being that you need to use their proprietary 2600mAh cell to do that.
So there, if you're considering lower output options for off-the-shelf lights, there are others, like the NiteCore P20UV and StreamLight NightCom UV. Another option is P60UV modules.
Hope this helps!
Remember to use eye protection at all times when using UV emitters.
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Thanks Jonathan for the detailed explaination.
I'm searching for a light that have a white light and UV of 365nm. Both of them have it, I have the Ultrafire 501B-UV and realised that it is a cheapo version and correct me if I'm wrong, it's using a 390nm emitter. Looking for a shorter wavelength as it let me 'discover' more stuffs. (Nothing dirty in mind.) So I was thinking, it the Nitecore CU6 is okay or should I save up for Klarus RS20-UV as you said it have the best UV emitter. In Singapore the price of the CU6 is $160 while RS20-UV is a $100 more. I'm a student and use it casually and I'm also a fan of LED lights. So I need a verdict to whether to buy CU6 or RS20-UV.
Thank you for your replies.
I'm searching for a light that have a white light and UV of 365nm. Both of them have it, I have the Ultrafire 501B-UV and realised that it is a cheapo version and correct me if I'm wrong, it's using a 390nm emitter. Looking for a shorter wavelength as it let me 'discover' more stuffs. (Nothing dirty in mind.) So I was thinking, it the Nitecore CU6 is okay or should I save up for Klarus RS20-UV as you said it have the best UV emitter. In Singapore the price of the CU6 is $160 while RS20-UV is a $100 more. I'm a student and use it casually and I'm also a fan of LED lights. So I need a verdict to whether to buy CU6 or RS20-UV.
Thank you for your replies.
rhildinger
Newly Enlightened
I've seen this advice reposted many times, but I have to ask... Why is eye protection needed? Is the level of UV radiation really that much higher than you get with normal sunlight, or a blacklight-lit party room with GITD paint? Just curious...
rhildinger
Newly Enlightened
lightryko,
I have the Nitecore CU6, but not the Klarus RS20UV, so I cannot give you a definitive answer to your question. That being said, I believe that based on the information that jonwkng provided above and photographic evidence on the net the RS20UV will give you superior performance in the UV range. I believe it has higher output power than the CU6, despite their claim of 3000mw, which is clearly the input power specification, not the output. Also, the deep single-reflector design of the RS20UV gives a much brighter and more focused hotspot than the CU6.
-Robert
I have the Nitecore CU6, but not the Klarus RS20UV, so I cannot give you a definitive answer to your question. That being said, I believe that based on the information that jonwkng provided above and photographic evidence on the net the RS20UV will give you superior performance in the UV range. I believe it has higher output power than the CU6, despite their claim of 3000mw, which is clearly the input power specification, not the output. Also, the deep single-reflector design of the RS20UV gives a much brighter and more focused hotspot than the CU6.
-Robert
Among many reasons, your eyes don't squint qhen looking into UV light. Imagine looking into a 1,000 lumen light without being able to squint.
Regarding your question,
In general, polycarbonate lenses have superior UV protection, however, wrap-around style UV safety glasses provide better coverage against leaks from around the lens. This is a big issue because of reflected UV. Yes, UV reflects off of quite a lot of surfaces, and the danger is, it usually is not visible (especially for good quality emitters) and it does not cause pupillary constriction like visible light does.
Here's something I've posted previously-
Things to note about high output UV lights:-
▪ Most of the tasks we flashaholics use UV flashlights for are likely to be close-range work - Inspection of leaks and stains, spotting scorpions, curing Norland. Couple that with the inverse square law and you could be exposing yourself to harm if you do not protect your eyes.
▪ UV emission is in a band, so for example, a NiteCore CU6 or P20UV may be advertised as 365nm output, it is emitting with a peak output at about 365nm. There will still be some emission at other wavelengths in the neighbourhood of the peak. For higher output emitters like the '3W UV' emitter used by NiteCore and some of the P60 drop-ins, this 'spill' emission can still have significant energy (HEV/Near UV).
▪ The energy output of many of the higher energy emitters demands a lot of care. In general, the better quality UV emitters emit very little visible light.
Eh, you're from Singapore too?
"Best UV emitter" is pretty subjective.
The UV module in the Ultrafire may be all you need.
Both lights cost quite a fair bit.
The choice is yours.
What would anyone need a high throw 365nm UV flashlight for?
Honestly, I have no clue, which is why I have't got a RS20UV. Yet.
It is a pretty specialised light, UV-wise. In addition, white light output is through the diffused side window only.
Most of us get a specific wavelength for a reason - for me the 365nm selection is mainly for Norland 61 Curing.
If you like "discovering stuff", longer UV wavelengths may be useful too.
Here's a good read from the Malaysian Journal of Forensic Science:-
http://forensics.org.my/img/Article 04.pdf
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scintillator
Enlightened
Very nice post jonwkng;
thanks for the link to the article.lovecpf
thanks for the link to the article.lovecpf
