Candela of SFT40 and SST70 in a C8 host?

4 posts / 0 new
Last post
fogofwar
Offline
Last seen: 4 hours 36 min ago
Joined: 08/19/2021 - 05:38
Posts: 49
Candela of SFT40 and SST70 in a C8 host?

I searched all over for this but couldn’t find the answer. Does anyone know the approximate candela of a SFT40 and SST70 with a C8 reflector?

For reference, I have a SST40 in a C8 sized head with 80 kcd and a CULPM1 with 210 kcd. SFT40 and SST70 should both be higher than the SST40.

fogofwar
Offline
Last seen: 4 hours 36 min ago
Joined: 08/19/2021 - 05:38
Posts: 49

As a followup, I think C8 is a good standard to measure throw since it is probably the most popular host and works with most emitters. For example, I’ve never seen someone attempt to put a SBT 90.2 in a S2 body.

The SST40 with 80 kcd has a 5A driver, and the CULPM1 with 210 kcd has a 7A driver. I also have XHP70.2 in C8 sized hosts and they have 30-35 kcd at 6V and 5A. The 30 kcd has color temperature of 4000k and the 35 kcd is at 6500k.

EasyB
Offline
Last seen: 21 hours 38 min ago
Joined: 03/09/2016 - 15:24
Posts: 2189
Location: Ohio

SFT40 should be a bit more candela than a dedomed or sliced SST40 at a given current, and it can be driven harder.

Not sure about the sst70, but I wouldn’t expect it to throw better than the sst40, at equivalent current density levels.

fogofwar
Offline
Last seen: 4 hours 36 min ago
Joined: 08/19/2021 - 05:38
Posts: 49

SST70 and SST40 are both 5050 size although the emitting area is a tad larger on the SST70. But given SST70 can push 3500 lumens I would assume that it can get close to 100 kcd in a C8. I think a SFT40 would push 150 kcd or so but it would be nice if someone here has actually tested it.