Re: TK61vn V3.5
I just wanted to clarify that while, all things being equal, a smaller emitter will out throw a larger one due to higher surface brightness, things are typically not "All Equal". IE: There are larger emitters that can be used in situations that out throw a smaller emitter, often with a larger hot spot, etc.
It mostly boils down to lux on target being lumens per square meter....so, if an emitter has enough lumens, and is focused upon a small enough area of square meters, it will throw farther than another emitter that puts fewer lumens per square meter on the target.
FOCUSING a smaller emitter is EASIER, as its at least closer to being a "point source", which gives an advantage, and, combined with the lumens it does generate therefore all starting from a smaller point, it does give an higher effective surface brightness....but, there's a reason why you don't see an XPE2 used instead of an XGP2 or XML2 in some lights...if souped up enough, even though is EASIER to get higher surface brightness from a smaller emitter, the smaller emitter may not be able to be driven as hard, and the larger LED may be able to overcome the size disadvantage with brute force lumen output.
So, for any given focus system there will be limiting factors and points of diminishing return...and an "optimum" LED choice, but, you can't say as a blanket statement that one LED will always throw farther because its smaller.
I have XPG2 versions of lights I also have in XPE2 for example, and, the larger LED out throws the smaller LED, and both examples are driven as hard as they can...but the larger one simply has enough additional lumen output to compensate for the larger area.
So, sure, an MTG2 that out throws an XPE2 or even XPG2 is not out of the question...if the light is large enough to focus it....but, for a lot of large lights, an XML2 simply can be pumped hard enough to make up for its larger emitter surface....and get more range than any of them.
For a smaller light, the reflector size, etc, can make the XPG2 the better choice, and so forth...the focus system will help dictate the LED choice.
I just wanted to clarify that while, all things being equal, a smaller emitter will out throw a larger one due to higher surface brightness, things are typically not "All Equal". IE: There are larger emitters that can be used in situations that out throw a smaller emitter, often with a larger hot spot, etc.
It mostly boils down to lux on target being lumens per square meter....so, if an emitter has enough lumens, and is focused upon a small enough area of square meters, it will throw farther than another emitter that puts fewer lumens per square meter on the target.
FOCUSING a smaller emitter is EASIER, as its at least closer to being a "point source", which gives an advantage, and, combined with the lumens it does generate therefore all starting from a smaller point, it does give an higher effective surface brightness....but, there's a reason why you don't see an XPE2 used instead of an XGP2 or XML2 in some lights...if souped up enough, even though is EASIER to get higher surface brightness from a smaller emitter, the smaller emitter may not be able to be driven as hard, and the larger LED may be able to overcome the size disadvantage with brute force lumen output.
So, for any given focus system there will be limiting factors and points of diminishing return...and an "optimum" LED choice, but, you can't say as a blanket statement that one LED will always throw farther because its smaller.
I have XPG2 versions of lights I also have in XPE2 for example, and, the larger LED out throws the smaller LED, and both examples are driven as hard as they can...but the larger one simply has enough additional lumen output to compensate for the larger area.
So, sure, an MTG2 that out throws an XPE2 or even XPG2 is not out of the question...if the light is large enough to focus it....but, for a lot of large lights, an XML2 simply can be pumped hard enough to make up for its larger emitter surface....and get more range than any of them.
For a smaller light, the reflector size, etc, can make the XPG2 the better choice, and so forth...the focus system will help dictate the LED choice.
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