well im not sure about the wavelenth stuff, tho it makes sense. but i have been a firefighter for 7 years now and can tell you from experience that i have yet to find an LED that works as well as an incan on the fireground. i have three lights that i use regularly on the fireground, a streamlight litebox that we have on all the trucks, a streamlight survivor incan strapped to my chest, and a streamlight vantage LED on my helmet. the vantage is great but as soon as i go interior, i switch to the survivor, wich has almost no spill at all wich i think is why it works so good. the vantage works really well for working on ladders and hoselines outside. i have yet to try a warm tint LED (becuase i dont have one). i have also not tried the new recoil LEDs from pelican, or the new streamlight survivor LED tho i have heard they are good at cutting thru smoke. as for the 500+ lumens thing, well i havent quite gotten there in my flashaholism... yet