WTS/GB: [4000k ARRIVED, Test Report's In] GT-FC40 (a.k.a. XHP70's flattop, 12v 40w sister) 95 CRI, Available in 4000k, 5000k

The 3A limit is also a possible issue if it truly can’t handle anymore then that. That could be a real issue with using FET drivers which would make it even harder to use these.

I quoted 3.0-3.5 A from the manufacturer’s spec sheet. I have no idea how much it can take more than that due to the lack of testing equipment. I sent the samples to djozz for this purpose.

In comparison, the 12v version XHP70.2’s are rated at 2.4A as the absolute maximum, yet I saw people overdrive the hell out of it.

These FC-40 can probably survive well above 3.5A (at least for a short period), but I probably don’t want to take responsibility for that claim. :wink:

Anyway, djozz has gotten samples, and I hope he publishes the result soon. Keep an eye on the discussion thread.

I thought it strange that the limit would only be 0.5A more then the rating.

Definitely interested in:
(1) 4000k
(1) 5000k

Clemence had problems placing four E21a’s too close together, some of the photons would go out the side of the emitter and heat up the one beside it. It lead to the whole array overheating and dying.

This led has the advantage of phosphor between the dies but the four in the middle may have a hard time trying to stay cool.

Test:

Please put me down for
2) 4000K
2) 5000K

Thanks for the test Djozz. Very interesting results.

I would be interested in a ~4500k 95CRI version for testing depending what my funds look like at the time.

If 4500k doesn’t happen then I could go either 4000k or 5000k. Both if I have the funds available.

If you could get this LED in 3V I would seriously consider swapping my EDC over to it. Just sad there are no TIR optics for this size LED in 20mm.

They said they can do 6v if there is enough demand, but that usually means thousands of pieces to be ordered. That’s something I don’t want to risk going bankrupt over. Maybe @Djozz could try desoldering one of these and see what’s beneath it and if swapping to 6v MCPCB is possible. I previously sent him two pieces so he can abuse one of them as much as he like. :smiling_imp:

4500k seems unlikely as they usually make A5, A4 and C2 bins in their other product stack.

1pc 4000k

1pc 5000k

Anyone care to guess the throw vs xhp35 hi at the same current?

I’d hazard guess slice&diced XHP70.2 in term of beam profile, but less overall brightness due to “CRI Tax”

Please double my initial interest. Thanks

1x 4000k for me

Thank you for organizing this. Any possibility of including the A3 bin?

I will focus on A4 and A5 in this GB run. Other bins may be possible in the next round, if this run is successful.

Current interest list:

I’m happy to partner with BlueSwordM. He will also help gathering the interest list.

Let’s keep the number going :slight_smile:

So, should we watch this thread for updates, or the BlueSwordM sales thread where this partnership is also mentioned?

The interest list will be primarily based in the google docs and the orders in BSM sale thread. But I will try to update the list in this page too.

If someone put in their name here, their name will appear on the google docs as well. Unless its duplicate with BSM thread.

I’d say both.