I fixed my FW3A-SST20 so it doesn’t look green any more. I added a Lee 248 “half minus green” filter between the optic and the lens.
It’s a really nice shade now, but the lumens are even lower than the already-unimpressive numbers it started with. I measured three lights just now at the 1×7135 (350mA) level in my lumen tube…
XP-L HI 3D: 143 lm
219B 4500K: 91 lm
SST-20 4000K w/ minus-green filter: 70 lm
The efficiency is pretty bad. 110 lm/W for XP-L HI, 70 lm/W for 219B, and just 54 lm/W for a rosy SST-20.
I also tried a Lee “quarter minus green” which would increase the lumens a bit, but I didn’t think the effect was strong enough… so I went with half minus green instead.
As a nice bonus, the pink filter is clearly visible through the lens, and it looks really nice inside the purple FW3A host.
Based on maukka’s numbers I projected the following data for a Convoy Biscotti driver and an SST-20. Does this look right? The 1/10th resolution lumens are directly from his data, the mutliple decimal resolution lumens are from a 6th degree polynomial I created in Excel based on his numbers. Clearly the fit isn’t perfect as your approach 0mA but I bet it isn’t too far off (estimate 0.5lm at 2.8mA).
I would but now that i have looked up what the FW3A is, that is too nice to tear apart. Eventually it may become part of my daily rotation.
Then just get the FW3A to use in stock form and experience the SST20 that way.
User BlueSwordM ran a group buy, but has reported it is now all done:
http://budgetlightforum.com/node/67401
Kaidomain.com and intl-outdoor.com sell bare SST20’s, although the FB4 tint bin they have appears green tinted to some users. Others don’t notice.
I fixed my FW3A-SST20 so it doesn’t look green any more. I added a Lee 248 “half minus green” filter between the optic and the lens.
It’s a really nice shade now, but the lumens are even lower than the already-unimpressive numbers it started with. I measured three lights just now at the 1×7135 (350mA) level in my lumen tube…
The efficiency is pretty bad. 110 lm/W for XP-L HI, 70 lm/W for 219B, and just 54 lm/W for a rosy SST-20.
I also tried a Lee “quarter minus green” which would increase the lumens a bit, but I didn’t think the effect was strong enough… so I went with half minus green instead.
As a nice bonus, the pink filter is clearly visible through the lens, and it looks really nice inside the purple FW3A host.
So I finally have a 4000K light I like.
TK, where did you get the Lee filtets? I don’t need a whole collecting.
EDC rotation:
FW1A, LH351D 4000k (second favorite)
FW3A, LH351D 3500k
FW3A, SST20 FD2 4000k
FW3A, Nichia 4000k sw40 r9080 (favorite light!)
FW3A, Cree XP-L Hi 5A3
Emisar D4V2, SST20 4000k
S2+, XM-L2 T6 4C
I got some big sheets of the 3 most popular types IIRC awhile back, I will never use all of it.
Send me a message if you want some, I can sell a piece of each of them if you want.
I think I got them off amazon?
Texas Avenger Driver Series
My LED Test series - XP-L2 V5 - Nichia 219C 90+ CRI - Latticebright "XM-L" - XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5 - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT - XHP70.2 P2 - XHP50.2 J4 - Samsung LH351D
Easy comparison tool for all my LED tests
where to buy
Lee Filter Swatch Book
info
http://budgetlightforum.com/node/43104?page=1
WTB Novatac Pocket Clip
Based on maukka’s numbers I projected the following data for a Convoy Biscotti driver and an SST-20. Does this look right? The 1/10th resolution lumens are directly from his data, the mutliple decimal resolution lumens are from a 6th degree polynomial I created in Excel based on his numbers. Clearly the fit isn’t perfect as your approach 0mA but I bet it isn’t too far off (estimate 0.5lm at 2.8mA).
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