Both the T1 and T2 use the same "85 lumen rated LED". The only difference is in how the LED is driven. The T1 LED is driven hard for max bright with short run time. The T2 LED is significantly under driven to achieve higher efficiency with lower output
but several times the runtime. The new T2 probably puts out no more than 50 lumens I'm guessing. They gave the new T2 the flared head for enhanced throw, (and perhaps other beam modification like wider hotspot etc.,) and to maximize the benefit from the under driven LED source. (I learned this from just reading MattK question and answers in the other long Inova 2007 products thread)
The confusion is, as usual, the result of Inova's… um… marketing people. (Incidentally, someone at the top doesn't want to disclose what LED they are using in the new X1 and the new Bolt series. Probably all a part of marketing hoopla… so that people don't find out they aren't using the latest LED's? Who knows… but
in this thread covering the Bolt series, it is strongly suspected they use the "Rigel" LED in the new X1 and Bolt)
Pokerstud said:
Why did they use the K2 emitter? Very inefficient
I'm sure the engineers wanted to. But Inova is probably locked into some kind of agreement with Lumileds to use their LED's. I bet the Inova CEO and bigwigs play golf with the Lumileds chiefs and therefor it's all wrapped up. Besides, Lumileds will come out with newer products, and be on top of the heap for a while... and around it goes.
The machine grinds on, money floods in regardless... and they want the consumers to not ask such questions and just buy based on wattage numbers. The bigger the number on the package the brighter it is. It's all been worked out for us