I’m hoping to find a home for a red sst90 I picked up. I’m hoping it’ll fit in the hd2010 or perhaps a Keygos M10, has anyone tried ?
cool idea ,maybe you can try :bigsmile:
That a neat idea.
I think an SST-90 would fit in just fine for an HD2010—I own them both.
Now you’ll have a red spotlight!
You’re going for direct drive, I presume? Good luck!
I’m thinking with a KingKong It’ll run the sst90 at triple the brightness of the red xpe. I won’t be swapping the driver, as I don’t have that kind of skill
Sounds very interesting.
Awesome! Make sure you take lots of pictures! 
Direct drive, perhaps ?
I think I heard that the original HD2010 driver does direct drive on high mode.
Even in my own HD2010, the current and brightness fluctuate depending on the battery’s charge.
Yeah, no need to swap out the driver since it is DD on high.
But the light doesn’t have the mass necessary to fire it up all the way. You couldn’t run it long. If you got 1300 lumens or so on DD, you’d be lucky. So you might just drive a U3 at 4 amps and have about the same brightness and better workability (plus better throw from the smaller die).
Then again, I’d love to see someone try it.
The SST90 has a significantly higher Vf than an XM-L and this why they don’t run at fun potential in single cell lights.
At 9 amps the forward voltage is 3.87 volts.
Compare this to the discharge charts from our member HKJ and you can see that the voltage of a 26650 immediately falls below this voltage when discharged at that current. This means it will NOT be able to support 9 amps with the SST90.
If you really want an SST90 to rock on a single cell setup, I have heard that by controlled overdriving before installing in a host the Vf can be reduced. Combine this with using an IMR based 26650 that will not sag under the high current as much you should be able to increase your output.
Also remember when your cell voltage is this close to the Vf combined with high currents, any resistance in the system is going to have a significant effect on your output.
EDIT:
I screwed up and was writing the above based upon a WHITE SST-90. The red has a much lower Vf of 2.2V at 6.3 amps. This will easily be achieved by a decent 26650. Should be a beast.
Best of luck and I hope to see the beamshots soon!
Yes, but this is a red SST-90.
Direct drive will probably kill a red LED… that low Vf is no match for a Li cell… current will go through the roof.
Would a A123 26650 work better because of the lower voltage?
The a123 does have a lower nominal voltage BUT they sag a lot less under high current loads. So at a 10 amp draw the A123 would actually have a higher voltage than a Lithium cobalt cell and maybe even a lithium manganese.
Perhaps the key is to switch to medium mode really fast before the LED burns up? :bigsmile:
Is driver a linear regulator? Hopefully it doesn’t burn out while reducing the voltage and turning the excess current into heat.
Would 3 Nimh AA be too much voltage for the red sst90? Or one lifepo4 cell? Hmm I did order an sbt90 as well, but I was really hoping to make use of the red sst90. I thought it would have a VF like the phatlight led’s where it’s 3v at 13 amps 
Thanks for letting me pick your brains on this. I’ll need to look at the VF difference and find a host. I only have the bare led, still waiting on the plate
3 nimh would be way to much. They are around 1.4 volts fully charged so that is around 4.2 volts. 2 nimhs however is 2.8 volts fully charged and around 2 volts fully discharged. That could work well for a direct drive set up.
I guess there's only one way to find out. ;)
It’s an expensive oops if I mess it up, hmmmm
Well, 2 nimhs is less of a risk than a lion.