Convoy T4

Thanks for letting us know. I have been thinking about a T3 and T4 orange combo to match my hi-viz work gear :smiley: . Kind of a bummer that the oranges don’t exactly match each other.

As mentioned before, the lower-than nominal CCT appears to only occur with high CCT 519A's, I'd say 4500K and above. (I haven't seen any data on the 4000k.) Not exactly sure why this happens.

My conjecture is that reflectors/optics blend the warmer sideways emission into the hotspot and shifts the color a bit along the BBL. A shift of constant distance along the BBL is known to affect CCT much more at the higher end; for an extreme example, even a tiny shift can move the T=infinity point to a finite-CCT point, resulting in an arbitrarily large drop in CCT.

It’s finally ready!

I really hope that the MAO light gray finish eventually finds its way to the S21A as well. That would look fantastic!

Simon: any updates on a version of the T4 that can use alkaline, NiMH, primary lithiums and 3.7v? It seems there are not many 2AA lights that can take all four chemistries/ voltages. I’d definitely be interested in a couple for backcountry use.

i got new driver , But since I still have some old drivers left, the update will take a while.

If you need T4 with new driver, pls note your requirement in the remarks of your order

What are the details on the new driver? Does it support all AA types and 14500 or was there some compromise made? Still 12 groups?

Yes, they are all compatible.

Just got a T4 519A 4500K and loving it. I just got back from a 6 year cold turkey of flashlights and whew was this a delight. My old lights were all on the cool side and I think I had only 1 neutral white light before. I’m planning to get another T4 but I was wondering if the SST-20 6500k / SST-20 5000k also have good tint? I dislike greens but any thing rosy is fine.

I love my 519a samples so far, but I’ve also always been very happy with the SST-20 in 4000k. I’ve found the cooler versions to really show up green while the 4000k seems to be a nice creamy white to my eyes. Others claim it is green still, and directly compared to a 519a/219b it sure can be… but in use its always been very nice. It should also be a bit throwier in the same reflector compared to the 519.

The SST-20s is more green at lower power levels, so how green they are all depends on the lights current to each LED (which will typically be lower on multiple LED lights) and brightness level. (Tint bin will also be a factor). For example on a DT8 anything at 5/7 and below is too green for my liking.

is the max lumens between the SST-20 and 219B that evident? Because if not, I might just try the 219B instead just to get the itch out and try a different led

It is, more or less. That said, I highly recommend at least one light in 219b (sw35 is my favorite, but sw35/sw40/sw45 are all wonderful). Then try SST-20 (4000k only) for more lumens and better throw. The 519a really helps bridge the gap in efficiency between the two and offers most of the 219b’s rosiness but is not as throwy in the same reflector as the sst-20.

That’s not to say the 219b is dim but you won’t be able to get the multiple thousands of lumens out of it as you would some other emitters.

2 Keeppower protected 14500 800mAh cells do fit both of my Convoy T4 lights!

Me too. I never use multiple unprotected cells in series unless they are in an insulated container (like in my large Maglites).

But like said in my previous post 2 Keeppower protected 14500 800mAh cells fit both of my T4 lights.

Xtar 14500 800 mah protected batteries fit without problems in Convoy T4.

What’s the point of using T4 or T3 or T2 with lithium batteries? The whole point is to use a safer chemistry with these flashlights. Otherwise, you get more performance in a smaller package with lithium batteries with an S2+ for example, right?

I agree with your point--in my opinion, AA-compatible flashlight manufacturers need to focus much more on optimizing performance on NiMH as opposed to 14500. Take the recent T3, for example: compared to its predecessor T2, it is 20% more efficient on 14500, but 40% LESS efficient on NiMH! To me, this is a horrible tradeoff because the main reason to get the T3 over S2+ is for NiMH use, since with lithium batteries, the S2+ outclasses T3 in both output and capacity, while not being much bigger.

EDIT: It is good to have the lithium compatibility as an option, but it should NEVER sacrifice NiMH performance!

The T4 was designed for multi-chemistry capability. The point is you have an option. Not sure it’s any more complicated than that. Use what you’re comfortable with.

I totally agree! And thanks for the info. I was thinking of bying a T3 just for that: NiMH batteries! I ’ll stick with my T2.

These days we have some very capable 14500 to choose from such that they compete or surpass what is available in 16340 cells and aren’t that far under most 18350 cells. So you get a slimmer body with more length, which many people find more convenient compared to the short squat bodies of those other lights, typically. S2+ feels a whole lot larger in both pocket and in hand, plus it’s a lot heavier. So 14500, I like it a lot. More light. For me, NiMH doesn’t offer the lumens I prefer although the extended run times are great. The fact that a 14500 light takes multi-chemistry cells is just a bonus for me, in case I need to run those sometime.

But it’s like any light…there’s a point or there is no point, depending on your needs or preferences, and just buy what you like best.

A lot of people liked the T3 because of the different look and the color options…plus they weren’t aware that the driver for the T2 had been improved since the first version of it, and the tube bore was widened a little (T2 was awfully tight for many cells, sometimes requiring you to remove head and tail to poke it out for cell changes). If he offered the T3 in black I would have gotten that because I do like the new design pattern, but the blue is really nice. I have a couple of both T2 and T3 and there’s not a lot of difference other than hand feel. In normal use I don’t think you’ll notice a huge difference in run times (efficiency) between the two drivers but I guess it depends which one is in your T2. When you just turn a light on, leave it alone and graph the output, that never replicates real use for the majority of people (but it’s a helpful comparison tool).