Luminus SST-20-W 4000 K CRI95 color and output test

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Last seen: 1 year 3 months ago
Joined: 09/06/2017 - 18:49
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Location: ks

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.

Last seen: 7 min 50 sec ago
Joined: 06/22/2018 - 09:18
Posts: 1024
Location: USA

Then just get the FW3A to use in stock form and experience the SST20 that way. Smile

User BlueSwordM ran a group buy, but has reported it is now all done: and sell bare SST20’s, although the FB4 tint bin they have appears green tinted to some users. Others don’t notice.

ToyKeeper's picture
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Joined: 01/12/2013 - 14:40
Posts: 10761
Location: (469219) 2016 HO3

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.

So I finally have a 4000K light I like. Smile

mattlward's picture
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Joined: 06/19/2015 - 09:20
Posts: 3181
Location: Illinois, USA

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

Texas_Ace's picture
Last seen: 2 hours 47 min ago
Joined: 03/24/2016 - 07:44
Posts: 9375
Location: Everything is brighter in Texas
mattlward wrote:
TK, where did you get the Lee filtets? I don’t need a whole collecting.

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?

jon_slider's picture
Last seen: 55 min 44 sec ago
Joined: 09/08/2015 - 12:20
Posts: 5060
Location: Central North America

mattlward wrote:
Lee filters?

where to buy
Lee Filter Swatch Book


buck91's picture
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Joined: 07/29/2016 - 08:21
Posts: 683
Location: Michigan

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).