My FT03 XHP50.2 can do continuous turbo (I’ve turned off the step down) until the battery dies if I’m walking and it’s –15 or colder. Can’t say none and not specify the conditions :partying_face:
Here’s an example. Per Maukka’s review of the H600Fc Mk4, (1124 lumens measured @30s vs. 1568 advertised). Maukka is one of the most reputable member here with a super expensive, validated integrated sphere. But keep in mind Zebralight is not the only one. Almost all of the manufacturer’s lumen ratings are 15–25 higher than actual as if it’s the industry standard. Only Fenix and Olight lumen specs are accurate and sometimes even conservative.
The FT03 with XHP50.2 cannot maintain anywhere near turbo output
Did you read my entire post? It most certainly can when it’s sufficiently cold out, and there’s airflow.
PID means that output is adjusted by PID (proportional, integral, differential derivative, for the components in the feedback formula to avoid oscillation) controller to avoid overheating, so runtime and output will strongly depend on room temperature and ventilation, output certainly won’t be constant.
Edit: PID link on Wikipedia
Hasty generalization. Look at what Maukka actually says,
Why wouldn’t Maukka just say what you’re saying, that all Zebralight’s numbers are exaggerated?
I was wondering about PID, appreciate the explanation, but the conclusion “output certainly won’t be constant” doesn’t follow unless you add some qualifiers, like 100° ambient temperatures.
The output graph SKV89 posted from 1lumen.com appears to show some remarkably constant output at 1000Lm. I wish it showed more resolution on what was happening in the first 5 minutes.
The human eyes are poor at gauging lumens. If you measure the actual output using equipment, even if there is good airflow and cold weather, the output will still fall and it will not be able to maintain anywhere turbo output.
How much will the output really fall though? Just due to voltage sag? The 50.2 has a pretty low Vf. Otherwise it’s just going full FET with step down disabled.
Jaxman X2
The objective of PID is avoiding output and temperature oscillations (and overshoot) that happen with simpler controllers (i.e. the flashlight overheats, output decreases, the flashlight cooldowns,then output increases again), it will be as constant as possible but it won’t be constant over the entire discharge. That they say output is regulated by PID means that the initial output won’t be sustained (unless the room temperature is cool enough) - they wouldn’t need to say that otherwise.
Well you see there is only TWO lights on zebralights product pages that show your example and they are AA lights and EVEN then they are an outlier as out of their entire lineup of AA lights only the SC5c and SC5w present the example you mentioned. Now if you look at EVERY lithium variant it WILL list something along the lines of “High: H1 X Lm (PID, Y hrs)”. When I said its basically copy pasted look at everything under “Main features” everything is identical for essentially every light they just plug in lumen values and dimensions of protect that is to say they use a template so they wouldn’t leave things out by mistake its designed for simplicity.
Case and point :
Zebralight SC64w HI 18650 XHP35 = High: H1 1300 Lm (PID, 2.8 hrs)
Zebralight SC600w Mk IV Plus 18650 XHP50.2 = High: H1 2300 Lm (PID, approx. 1.8 hours)
Zebralight SC600F Mk IV Plus 18650 XHP50 = High: H1 2260 Lm (PID, approx. 1.8 hours)
Do you see what I mean now ?
We were talking about SC700d, and you made an assertion that wasn’t true about SC700d product page. I never disagreed with what you were saying, except about the SC700d product page. Now you’ve posted examples of other models product pages that also don’t list step down. What are you doing? I’m missing your point. That standardizing their product pages means ZL is lazy? Where are we going with this?
I really like this torch, it looks solid and has a magnetic tail cap like the D4SV2. For the price I might pick one up next week.
I really doubt their 2400 Lumens for 73 minutes claim. The D18 with all 18 sst20s and its surface area barely does 2000 sustained. Looks quite bogus if you ask me
In simple terms, PID means that output will be adjusted by an algorithm. It is not a timed stepdown nor the flashlight steps down to a fixed value like 30%. The runtime will be shorter at 40F than at 100F because the output will be higher, so they can’t give an exact runtime.
Sigh…… Guessing you didnt see that PID was mentioned in every light linked…. which in essence is a system that thermally regulates its output thus a “Step down”. So do you understand now ? or are you missing the point again ?
Interesting. Thank you for clarifying.
ggf31416 has claimed PID is not a timed step down. But that was not your opinion, and originally, apparently. you were using “step down” as a synonym for PID without mentioning so and assumed everyone knew this. I was using ZL’s indication of highest mode switching to a lower mode after 3 minutes to indicate a step down, so I figured you were in error about the information on the SC700d product page, but you were talking about PID while literally writing “step down” instead. You have now finally revealed your belief that PID is the same thing as step down. The fact is you were unclear. I now understand what you were attempting to say, and what your opinion is regarding PID, step down, and the information given on ZL product pages, which is probably false equivalency, and I would have just as easily without the snarky ad hominem. Good day to you, sir.
They are calming 1800 on there SST40 and 2400 on there XHP50.2. For the price if it sucks I’ll just do a complete mod plus almost every manufacture lies about there max output and running times nowadays, I’m more interested in what it will do in high mode. I’ve read that Jackman torches are made quite well for the money.
Let me elaborate further…… I’ll try and breakdown PID as simply as possible so I can explain it to you without ambiguity, in its most BASIC form it is a “step down” regulated by temperature derived from an algorithm. So if its hot it will lower its output accordingly by “stepping down” and once it reaches a cool enough state it can increase its output again. General other forms of “step down” are either a timer based or throttling the output due to temperature to specific level once either or is achieved.
Thus PID in the most basic way of explaining is essentially a regulated “step down”. Have a great day.
I really think that the 2400 lumens before stepping down will last a few minutes at most. There simply isn’t the surface area to radiate so much heat.