LG 365nm UV led tested (LEUVA33W70RL00, from Simon)

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Lexel
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d_t_a wrote:
Yokiamy wrote:
d_t_a, is the Nichia mounted on a DTP mcpcb?

Where did you buy it?

Actually I’m not sure if it’s on a DTP mcpcb, will have to take them out again to find out. I got them I think sometime early last year (the S2+ Nichia UV) — it was bought from Gearbest (with discount code)

Convoy S2 (LG UV) = I bought this direct from Convoy AliExpress store.

it cant be DTP as the LED has no neutrtal thermal pad

Theodore41
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I received by Aliexpress,the Convoy s2 gray light with the filter, https://www.aliexpress.com/item/32955740360.html, and tried to compare it with my old one,https://www.gearbest.com/led-flashlights/pp_277704.html ,but I couldn’t find enough difference,except that the new one gets hot in a few minutes. Any comments please?
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Visually it’s hard to see a difference, but with a UVA meter the increase in radiant output is significant for the LG based light. Your new light gets hot with a fresh battery because it’s driven at 1750ma (compared to 700ma for the Nichia light). But after a few minutes the battery will discharge below the Vf of the LED and drive current will drop significantly.
Another note – we are running some spectro tests on wavelengths and power. Nichia, with the small die and reflector, is competing well (brightness) with the larger die LW part. Nothing solid yet, in the middle of compiling the data. But for me, I don’t really see any major difference between all these 3w, 5w, 6w lights – certainly nothing to justify the higher prices. (My use is illuminating fluorescent minerals)

Mark

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pirateo40
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Stop motion video of UVA radiant output of a 6w “Convoy” type light as the battery discharges
over one hour period here

https://www.naturesrainbows.com/single-post/2015/05/02/Power-Claims-of-Convoy-Type-Flashlights – for some supporting data showing this decrease in power

Mark

MinerShop.com

 

andrx
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can a 18650 battery burn this led?

Convoy S2+ orange biscotti V21A
Convoy S2+ violet LEUVA33W70RL00
Lumintop AA tools 2.0
Shustar A1000 clone
Zanflare C4

Lexel
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andrx wrote:
can a 18650 battery burn this led?

DD it from a high drain may kill it

andrx
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Lexel wrote:
andrx wrote:
can a 18650 battery burn this led?

DD it from a high drain may kill it

this is the battery

Brand: Samsung
Model: ICR18650-22E
Capacity: 2200mAh Rated
Voltage: 3.70V Nominal
Charging: 4.20V Maximum
1100mA Standard
4400mA Maximum
Discharging: 2.75V Cutoff
440mA Standard
4400mA Maximum

Convoy S2+ orange biscotti V21A
Convoy S2+ violet LEUVA33W70RL00
Lumintop AA tools 2.0
Shustar A1000 clone
Zanflare C4

Lexel
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best is you choose a driver with like 4-6 AMCs fore max output on DTP MCPCB

similar battery tested here
https://lygte-info.dk/review/batteries2012/Samsung%20ICR18650-22F%202200...(Green)%20UK.html

when full you may see over 3A on the LED

andrx
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Lexel wrote:
best is you choose a driver with like 4-6 AMCs fore max output on DTP MCPCB

similar battery tested here
https://lygte-info.dk/review/batteries2012/Samsung%20ICR18650-22F%202200...(Green)%20UK.html

when full you may see over 3A on the LED


and it’s not good? (really i don’t know)

Convoy S2+ orange biscotti V21A
Convoy S2+ violet LEUVA33W70RL00
Lumintop AA tools 2.0
Shustar A1000 clone
Zanflare C4

Lexel
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the output graph may look good if it would be a white LED but UV seem not to like to run hot
the junction temperature is mostly a lot lower

andrx
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Lexel wrote:
the output graph may look good if it would be a white LED but UV seem not to like to run hot
the junction temperature is mostly a lot lower
Thumbs Up do you know a good battery for this led?

Convoy S2+ orange biscotti V21A
Convoy S2+ violet LEUVA33W70RL00
Lumintop AA tools 2.0
Shustar A1000 clone
Zanflare C4

djozz
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The car analogy would be: do you know good fuel for these wheels.

oweban
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Wish these were available bare! I’ll just be removing them from the MCPCB anyway…

andrx
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Lexel wrote:
the output graph may look good if it would be a white LED but UV seem not to like to run hot
the junction temperature is mostly a lot lower

anyway Simon sent me a new pill+led+driver and its work fine now Crown

Convoy S2+ orange biscotti V21A
Convoy S2+ violet LEUVA33W70RL00
Lumintop AA tools 2.0
Shustar A1000 clone
Zanflare C4

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