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Pretty much.

Wouldn't light up the power pylon at 60m in the city tonight.

I get a good evenings shooting, so 4-5 hours at a guess.

No idea, I might have to do a test. I mainly use full power when out after rabbits and hares.

Gives the hot spot a slightly tighter beam but twice the intensity. Also gives a yellower hue which cuts the air better.

Yes, the white just seems to reflect back badly off everything in the air whilst the yellower hue seems to cut through a lot better. If practical de-doming will help. Will also give a slightly...

The yellow is the de-domed one. Ready for the other one to be doctored?

To be honest I would not bother with anything that uses AA or AAA to power it, they are very low energy density compared to Li-Po cells like the 18650. ie, you will need to carry more weight and...