2x MT-G2 on octogons Mod (beamshots on page 3)

Ok fairly simple mod. It's a 2xMT-G2. The host is a Ultrafire 4xU2 2/3 26650. I drilled two of the reflectors out to fit the emitters. I used the really useless driver as a contact board for a DRY driver and wired the two emitters in Parallel. Right now I'm running 2 king kongs and it runs great. It's very bright, huge hotspot great tint. It is so tempting to put that third 26650 extension on. But I'm afraid it might fry the emitters. Anyone know if it would fry them or could they take it? They are on Octogons and seated pretty well, good thermal path. It heats up right away but isn't hot.

Reserved for beamshots and who knows what else. Ok the first shot is a single MG-T2 using a DRY driver in a ultrafire X8 The second is the one in this mod.

This is the same spot with a Good Sky Ray King.

The first thing that comes to mind is that you have 2 empty reflectors, better fill those :stuck_out_tongue:

If no emitters are destined for those reflector, some Tritium would be AWESOME in there!

3 cells in DD = no.

I get around 4.9-5 amps with a single MTG2 and 2 cells in series, I know two LEDs in parallel will draw more but still less than double. What's the tailcap current now?

Clearly you need to add two more MT-G2’s in parallel and then add the third battery

I don’t know because my Multi meter stinks. I saw your other post where you said 3 cells would fry one MTG2 and I wondered if you did that with one on copper or just a regular aluminum star?

I could do that as I have a couple extra and that was the original plan. But I don’t know that it would really be worth it. I actually have two extensions and could go with 4 batteries but I think the DRY driver would go night night if I did that.

That would be cool, I’ll have to think about it.

With 3 cells there won't be enough voltage sag to keep things in the survivable range. Even if the load pulled the cells down to 3v each, the resulting 9v would be enough to shove probably near 25 amps thru the emitters.

How about 4 cells, and wire LEDs in series?

I could do that because I have an extra extension. I thought about it but it would fry the DRY driver wouldn’t it? If not I’ll go for it. But I like having the modes for walking with. I keep my lights on low and then hit high when I get out to the openings.

Dunno, never messed with one of those drivers.

I know this is my answer whenever multiple MTG2 threads crop up, but the IOS 9A driver would split the current and give 4.5A to each LED, if they're still in parallel. And it'll run from either 2 or 3 cells - specs say "Input Voltage: 5.5-12V (max 15V)".

I think for now I’m just going to be happy with what I have. It’s very nice, great tint super floody and not so huge to carry. I’ll know more in a couple hours when the sun goes away. Big moon out tonight though.

that is totally awesome. how much did it cost you to build that piece?
cant wait for them beamshots!!

It cost me $86. I couldn’t talk my cameraman (my wife) into going for a walk last night so maybe tonight on the beamshots. It seems to be about as bright as a good SRK with twice the area covered.

what in the heck! twice the coverage area!? you mean the flood and spill is twice the size?
if thats true, so this is even floodier than your 9xt6 that you just sold?

Yep twice the coverage area. About the same size area at the 9xT6 but with a neutral tint no real noticeable hotspot it just gradually gets less bright around the edges. It’s not as bright as the 9xT6 though. That light has a huge spill and very very bright. (I have the 15x with 4 26650’s on the way now $86 it’s what I sold the 9x for) I also have a 6x U3 that is driven at 3amps per emitter. If you want to talk about wow factor that one has it.

thats very cool then.
but what sounds even more cool is that 6x xml haha.
how many lumens you say? whats the power behind it?

It’s probably around six thousand even after it’s been on awhile. It has 3x 26650’s and the International outdoors driver for 7x at 3amps per. It’s a beast.

Just for chits and giggles I rewired it in series took out the dry driver and ran it with 4 26650. It’s a freak show now. It gets really hot. But the batteries don’t so it’s fine and there is no driver to fry so no big deal I guess. I’ll probably switch it back soon enough but man it’s bright. It still doesn’t really throw though. It think part of it just that it’s so bright that it lights up around you so bright that you can’t see that light is getting down range.

Still no beamshots, it rained tonight so my cameraman didn’t want to go for a walk with me and get her feet wet.