Umm different lights, they can all illuminate the way, but they are designed for different things.
The TN36 is a flooder, it’ll light up a lot, a real wide area and very well. But it isn’t going light stuff up far away.
The TN32 and SR52 are I suspect very similar. They are quite bulky lights, but have largish reflectors and single LEDs. This means they are more throw biased, they’ll have a more sharply defined hotspot and throw a beam further than something like the TN36. But won’t light up such a wide area. There will also be a definite difference between hotspot and spill beam. This means the hotspot can appear blinding when used at closer ranges and can be enough to obscurer your night vision of seeing the spill beam.
To use a torch like this for walking you need to aim the torch down range so as not to cause too much glare from the hotspot on the ground in front of you.
I personally like my SR52, but it is a very different kind of light to the TN36.
With regards to the Olight M3X. I think by the looks of it, it uses the same reflector, emitter. This means it’s beam will look very similar.
The difference is in power. 2x18650 means it’ll be lighter and less chunky, although not actually massively smaller in width if the head is the same size and it’s obviously longer.
Runtime is very different too. The SR52 last about 3 times longer on high. But remember many high output lights these days don’t use flat regulation on their highest setting. They often direct drive the led to get the highest lumens from it. But output will drop as the battery depletes and can no longer offer up the goods.
Actually, this is a little misleading. I suspect the SR52 uses a linear type driver, so requires the battery voltage to be similar to the led voltage in order to get the most light from it.
As the SR52 is 3 batteries in parallel, it probably direct drives the LED @ 4.2v (3.6v nominal). On a single cell light you wouldn’t get much runtime like this, but with 3 batteries it massively extends this performance.
The downside is, you only get regulation while the batteries have suitable voltage, once this drops, output will gradually drop off too.
Here is the SR52, with good ICR batteries it manages stable output for about 15 mins, then starts to dip. IMR/INR batteries should offer higher output and longer regulation.
That said, output remains high for quite a long time, just not flat regulation and it takes almost 4hrs to drop to 50%.
This is good if you need lots of light for a long period of time. And remember the lower modes are regulated. as can be seen here below. This chart also shows the M3X on lower mode.
The thing to note here is, the SR52 can pump out a constant 600 lumens for slightly longer than the M3X manages to pump out only 300 constant lumens.
With regards to the M3X is runs on 2x18650 in series, higher voltage than the LED needs, so this is a buck driver. The big difference here is the high output mode. The buck driver due to 8.4v from the batteries is able to sustain higher voltage for far longer. This means the M3X has a regulated max output, where the SR52 doesn’t.
But it comes at a much reduced runtime. The SR52 takes almost 4 hrs to drop to 50% output on max (which is still 600 lumens).
But the M3X only makes is nearer to 1 hr. But note it is flatter regulation.
It’s kind of confusing. But does make them different.
If I was camping and was going to be away for a few days, the SR52 would be my choice. 600 lumens is plenty and has a massive runtime.
If it’s just for walking the dog for half hour, 45 mins at a time from home. Then the M3X will muster up more stable output at higher lumen levels than the SR52.