Review: Convoy L21A SST40 vs Convoy L21A XHP35

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lazerEagle
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That’s really neat.

Can you compare the throw performance to other common budget throwers? E.g. FT03 SST-40 ?

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lazerEagle
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I did find these pictures on the 1lumen review.

Indicates that the L21A 4kk is [in my opinion] nicer but less lumen count and a touch less candela?

He measured it at 227,575 Cd and the FT03 at 240,000 Cd in another review, so not a big difference assuming the measurement method was similar.

By comparison this would place it well above the C8, KR1, and other pocket throwers, as expected.

L21AXHP35

FT03 (assuming sst-40 5kk)

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Danthemanz
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Ive got little time ATM and im currently part way through clearing and rebuilding my thrower collection, but im sure i can get a few interesting comparisons. Hard part will be finding a stock light Big Smile
I wont have the time to measure the setup etc so it will only be relative throw numbers. Give me a couple of days.

lazerEagle
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The K1 XHP35 HI is available again, while it’s certainly a more premium product than the FT03 (and perhaps even the L21A) I think its useful to compare when evaluating Cd.

The numbers from the product page would indicate that it pokes a bit further. As they are tested independently we could infer that there isn’t a huge difference, particularly if ignoring the 5KK and higher CCT. (Green K1 still looks great!)

L21A XHP35 HI 4KK 227,575 Cd 954m
FT03 SST40 5KK 240,000 Cd 980m
K1 XHP35 HI 5KK-6.5KK 290,000 Cd 1,077m
K1 XHP35 HI 3KK-4KK 270,000 Cd 1,039m

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Rusty Joe
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That SST-40 is a beast!!!!

Sirstinky
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Rusty Joe wrote:
That SST-40 is a beast!!!!

It’s a pretty remarkable emitter. One of my favorites. Single die. Cheaper than a xpl2, fits where xml does, really low vf and can handle 7 amps without breaking a sweat. High surface brightness also, even higher than xp-l hi. It’s best driven hard in lights with good heatsinking. Only emitter that compares is Luxeon V, but it takes non conventional mcpcbs.

lazerEagle
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What would be a smaller host worth trying SST-40 in? I see KR1 comes with it, looks interesting, maybe something on a single 26650/

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niajef
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lazerEagle wrote:
The K1 XHP35 HI is available again, while it’s certainly a more premium product than the FT03 (and perhaps even the L21A) I think its useful to compare when evaluating Cd.

The numbers from the product page would indicate that it pokes a bit further. As they are tested independently we could infer that there isn’t a huge difference, particularly if ignoring the 5KK and higher CCT. (Green K1 still looks great!)

table(table#posts). |L21A XHP35 HI 4KK|227,575 Cd|954m| |FT03 SST40 5KK|240,000 Cd |980m| |K1 XHP35 HI 5KK-6.5KK|290,000 Cd|1,077m| |K1 XHP35 HI 3KK-4KK|270,000 Cd|1,039m|

do you know the numbers for FT03 XHP50.2?

lazerEagle
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No but it will throw the least out of the lot. A brighter light all round as a trade off.

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