I got my first XM-L light in thanks to 4Sevens BF sale and the first thing I wanted to do was compare against my XP-G lights. First of all I really like the beam of the XM-L. I, personally like the more floody patterns.
2nd, I like how much more efficient the XM-L is over the XP-G.........the only exclussion would be at low power where they are about the same efficiency. But at the shorter run times (or higher output), the XM-L looks to be about 20% brighter for the same current draw.
So here is a run-time graph comparing these 2AA lights that are pretty well known. The number on the left side of the graph is the Lux as reported by my light box setup and the Extech HD450 meter. Keeping all things constant, I can compare lights to each other but really can't measure lumen output.
What is important to me more than sheer output brightness, is efficiency. I like lights that are well regulated and give maximum output per battery energy. Believe it or not my favorite modes on the Quark_X 2AA are High and Medium because of this. The number I am calculating for efficiency is the area under the curve or (output X minutes). Basically if a mode is half as bright it should run at least twice as long. So I just measure this area and the bigger number means its more efficient.
I noticed that the XM-L doesn't get the boost in efficiency at lower modes as much as the XP-G does. Still the XM-L is as good as the XP-G at low modes but with the benefit of 20% or so efficiency improvement at the higher output.
All in all very happy with my new Quark X 2AA light.
2nd, I like how much more efficient the XM-L is over the XP-G.........the only exclussion would be at low power where they are about the same efficiency. But at the shorter run times (or higher output), the XM-L looks to be about 20% brighter for the same current draw.
So here is a run-time graph comparing these 2AA lights that are pretty well known. The number on the left side of the graph is the Lux as reported by my light box setup and the Extech HD450 meter. Keeping all things constant, I can compare lights to each other but really can't measure lumen output.
What is important to me more than sheer output brightness, is efficiency. I like lights that are well regulated and give maximum output per battery energy. Believe it or not my favorite modes on the Quark_X 2AA are High and Medium because of this. The number I am calculating for efficiency is the area under the curve or (output X minutes). Basically if a mode is half as bright it should run at least twice as long. So I just measure this area and the bigger number means its more efficient.
I noticed that the XM-L doesn't get the boost in efficiency at lower modes as much as the XP-G does. Still the XM-L is as good as the XP-G at low modes but with the benefit of 20% or so efficiency improvement at the higher output.
All in all very happy with my new Quark X 2AA light.
in order by efficiency
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