Imalent MS12

I hate switch that sticks. I have one HP desktop that has power switch that sticks, so when i power on the desktop, it sticks and i have to quickly try all efforts to unstick it, 80% chance the desktop would shut down.

Thanks a lot. Please do candela measurement, preferably outdoor if you can. Indoor will have too much reflection contribute to lux measurement.

Why would you expect more? The flashlight head is 5.1” in diameter and the Lumen Tube is 3.5” in diameter. So a huge amount of the light is not even going inside the Lumen Tube. If a GT70 only shows 3000, then 25000 seems about right.

When you get up to big lights with really high outputs you need to switch to a bigger integrating sphere. Like a big styrofoam cooler.

You start to run the risk of melting the diffusers in the TA Lumen Tube.

No problem…sorry i dont have any measerment stuff…DONT WANT ANY NEITHER…WILL MAKE ME CRAZY.but i got a DX80 TO COMPARE.

No problem. DX80 is flooder while R90C is thrower. But we still can roughly know how well R90C perform by comparing side by side.

I think that the best measurement is this comparison with the DX80.

The DX80 Throws great…more then anybody should need…i do want the R90C…might get that in a couple weeks…

hope I get mine soon

+1000.
I also believe that if we have a DX80,we don’t need a MS12,but we can think bying a R90C.

Im confused, light is claimed over 50k lumens, that to me is a bit low? i know even if u take into account loss of light etc its still a bit low too me and false marketing imo…. the actual lumens on turbo would be interesting to get.

Or do u mean in a perfect calibrated tube that can handle that much lumens it would show near those 50k ? then i understand.

In my head, comparing my GT on the 3.5” lumen tube, I would expect it’s real output to be 40k-45k lumen if you could get all of the light into the tube. It’s just a wild guess, but it makes sense to me.

It’s very simple how they get away with it. It’s because nobody enforces or checks them. They can pretty much say whatever they want and there’s no real consequences.

Publishing these specifications for output and waterproofness is all done as a courtesy, like on a handshake deal. There are no rules and regulations. They can’t be held accountable if it doesn’t live up to those specs.

Its prob the better choice and cheaper…but i wanted the MS12.NOW…lol…

DITO.for both our sake…

What I was stating was that my BLF GT measures about 3k lumen less than other people. So it measures about 5200 lumen. :weary: In regards to the measurement I don’t know what to tell mortuus. The measurement is what it is. I have no way of trying to figure out the output. I did go outside and take some lux measurements. At 20ft I saw 4100 lux. This produced a hotspot about 5ft in diameter. I tried some math taking the lux at the brightest spot and then measuring when it dropped to 50% of that value and then measuring the size of the hotspot and the beam angle. The math seemed to support an output of around 40k. But it is only a wild guestimation.

That is about 152kcd for 4100lux at 20ft. Better than DX80 by 50kcd if I remember correctly.

Not sure if you can fully visualize the issue. The MS12 flashlight head has a diameter of 5.1” or 20.4 in2 whereas his TA Lumen Tube can only measure up to 3.5” diameter or 9.6 in2. Therefore the TA Lumen Tube cannot capture all the light from this flashlight.

Additionally, after the whole ordeal of calibrating the TA Lumen Tube by the BLF community, I have a feeling that many manufacturers, especially the smaller ones, might be using integrating spheres that are not calibrated correctly without knowing it themselves. Prior to the calibrated TA Tube, most DIY measurements by BLF users are also miscalibrated higher than they should and this includes TA’s own measurements from before, which were about 32% higher than his current calibration. Even Djozz’s lumen measurements are, correct me if I’m wrong, still kept about 12% higher to be consistent with his previous measurements. The price of a certified integrating sphere is the price of a couple thousand cheap flashlights so most bargain manufacturers cannot afford one.

I don’t know if Imalent has a certified integrating sphere or properly calibrated measurement device. I read a few user reviews that measure the DX80 to be about 30k to 32k lumens, which is pretty good considering typical variations within the same model but the DN70 measured significantly less than the rated 3800 lumens. However, I no longer fully trust these user measurements unless it’s measured by Maukka or a calibrated TA Lumen Tube that fits the light head.

If you already measured several flashlights with TA’s lumen tube, you can measure again a couple of those flashlights and the MS12 with a ceiling bounce in a small room with white walls. It won’t be super accurate but will probably be more relevant than with a lot of light escaping from TA’s lumen Tube.

Rough estimate #1:

Output MS12 ≈ ((5.1^2)/(3.5)^2) * 25000 = 53k lumen.

So ironically it's spot on with Imalent's specs. Of course this is a rough calculation, and surely there are reasons why it's insufficiently accurate. But it's a method.

I could just as easily say lumen = candela * steradian

So we can calculate the steradian as Ω=2π(1-cos(θ/2) and candela with the formula candela = lx * (distance in meters)2

Ω=2π(1-cos(θ/2) where my θ = 38.83 , ≅.3593 steradian

candela = lx * (distance in meters)2 which is as follows candela = 4100 * (6.096)2 ≅ 152360 cd

lumen = 152360 * .3593 ≅ 54742 lm

How did you get your theta you say? Some measurements and the law of sines.

But all of these formulas make many assumptions and I have very little confidence in the final result. I did this math a few days ago, but you can't just make these assumptions and claim the reading is valid. Now I am sure everyone is going to say "Mark said the MS12 flashlight is rated at 54742 lm!" :FACEPALM: