So, as I shop for new lights to buy, I of course look at the manufacturers' website and check out the listed specs. In some cases, I'm shocked by how far off some these specs are from reality, when compared to user reviews and independent test, esp. Selfbuilt's (thank you Selfbuilt!).
For example, looking at the Sunwayman M20A, the manufacturer's website says medium 70lms for 24 hrs and low 4 lms for 200hrs... from 2xAA?? From SB's review of the light it turns out that low is actually ~ 0.3 lumens and that medium graphs out between a Fenix E21 (54 lms) and a Quark Mini AA2 (36 lms) for 10hrs. The 24 hours seems like a complete misprint since the SWM USA site even says 9 hrs.
In another example, the Klarus XT11 claims medium 150 lumens for 7 hrs and low 10 lumens for 295 hrs from 1x18650. Zebralight, arguably the efficiency king, can't even claim 3 lms for that long on an 18650. It turns out SB measures the XT11 low to actually be ~ 2.7 lms and the medium mode graphs out well below a Thrunite TN12 (95 lms) for the majority of its runtime. In all fairness the XT11 seems to start out near the 150 lumen mark - but rather than a nice regulated flat line, it seems to quickly drop and hold ~60% output for the vast bulk of its runtime.... but I guess all is fair under the ANSI standard?
Any other egregious lumen or runtime examples you folks have come across out there? Is this common across all manufactures, or are some manufacturers decidedly better/worse than others?
For example, looking at the Sunwayman M20A, the manufacturer's website says medium 70lms for 24 hrs and low 4 lms for 200hrs... from 2xAA?? From SB's review of the light it turns out that low is actually ~ 0.3 lumens and that medium graphs out between a Fenix E21 (54 lms) and a Quark Mini AA2 (36 lms) for 10hrs. The 24 hours seems like a complete misprint since the SWM USA site even says 9 hrs.
In another example, the Klarus XT11 claims medium 150 lumens for 7 hrs and low 10 lumens for 295 hrs from 1x18650. Zebralight, arguably the efficiency king, can't even claim 3 lms for that long on an 18650. It turns out SB measures the XT11 low to actually be ~ 2.7 lms and the medium mode graphs out well below a Thrunite TN12 (95 lms) for the majority of its runtime. In all fairness the XT11 seems to start out near the 150 lumen mark - but rather than a nice regulated flat line, it seems to quickly drop and hold ~60% output for the vast bulk of its runtime.... but I guess all is fair under the ANSI standard?
Any other egregious lumen or runtime examples you folks have come across out there? Is this common across all manufactures, or are some manufacturers decidedly better/worse than others?
