kosPap
Flashlight Enthusiast
Hi all! Title is telegraphic and does not tell the things exact.
While trying to compare LEDs for their "throw" potential I measured light box lumens and hotspot intensity of them in their respective P60 modules.
LEDs where XR-E, XP-E, XP-G, MC-E, XM-L in their own reflectors.
Since the output was not the same I calculated the ratio of hotspot Lux and lightbox Lux, in essence calculating the Lux per Lumen Ratio of the various combionations
Fast forward yesterday where the throw of the expected Armytek Predator XM-L version was discussed in the Greek flashlight forum.
So I started tinkering with numbers and made new measurements of XP-G & XM-L in a DBS, and XR-E & XM-L in a Solarforce Masterpiece Pro-1 head.
It turns out that the Lux per Lumen Ratio is a formidable tool since results were related and I could calculate throw of a given LED based on the rest of the measurements,even among different LEDs. I even want so far as to try it with Selfbuilt's measurements of the Lumintop TD-15 & TD-15X, only to get the same phenomenon
At that point I was pretty impressed and elated enough to make my own unit, Throw Potential (THp), which is of course the "Lux per Lumen Ratio in a given reflector"
Even installing my XPG & XML pills in an Aurora V6 that has an XR-E SMO reflector gave results close enough.
By nighttime this was troubling me, 'cos I can not possibly be a modern day Einstein making a breakthrow in Flashlight Universe Unification Theory! Obviously! But the repeatedly occurring calculation results hinded a hidden parameter.
So I proceeded in comparing the "Throw Potentials" of the XPG & XML. BAM!
For the sets of measurements I have, their ratio hovers around 2.5. (see the table above again please). So what this tells us is that the XP-G is 2.5 more throwy than the XM-L in similar reflectors.
No I do not believe in magic, so this 2.5 factor must be coming from somewhere.
Reflector mathematics are in order, but this is where the journey ends for me!
Your measurements are welcome!
I hope in your input & insight, Kostas
While trying to compare LEDs for their "throw" potential I measured light box lumens and hotspot intensity of them in their respective P60 modules.
LEDs where XR-E, XP-E, XP-G, MC-E, XM-L in their own reflectors.
Since the output was not the same I calculated the ratio of hotspot Lux and lightbox Lux, in essence calculating the Lux per Lumen Ratio of the various combionations
Fast forward yesterday where the throw of the expected Armytek Predator XM-L version was discussed in the Greek flashlight forum.
So I started tinkering with numbers and made new measurements of XP-G & XM-L in a DBS, and XR-E & XM-L in a Solarforce Masterpiece Pro-1 head.
It turns out that the Lux per Lumen Ratio is a formidable tool since results were related and I could calculate throw of a given LED based on the rest of the measurements,even among different LEDs. I even want so far as to try it with Selfbuilt's measurements of the Lumintop TD-15 & TD-15X, only to get the same phenomenon
At that point I was pretty impressed and elated enough to make my own unit, Throw Potential (THp), which is of course the "Lux per Lumen Ratio in a given reflector"
Even installing my XPG & XML pills in an Aurora V6 that has an XR-E SMO reflector gave results close enough.
By nighttime this was troubling me, 'cos I can not possibly be a modern day Einstein making a breakthrow in Flashlight Universe Unification Theory! Obviously! But the repeatedly occurring calculation results hinded a hidden parameter.
So I proceeded in comparing the "Throw Potentials" of the XPG & XML. BAM!
For the sets of measurements I have, their ratio hovers around 2.5. (see the table above again please). So what this tells us is that the XP-G is 2.5 more throwy than the XM-L in similar reflectors.
No I do not believe in magic, so this 2.5 factor must be coming from somewhere.
Reflector mathematics are in order, but this is where the journey ends for me!
Your measurements are welcome!
I hope in your input & insight, Kostas