Whew! Had me going there for a minute! It was stated previously that the images taken shining the GT on the radio tower in Pennsylvania were in 0º weather with 90% humidity. That really stumped me, as I thought water in the air should be frozen at that temperature. Sure enough, in zero degree weather the air’s capacity to hold moisture is 10% or lower.
So, the truthful answer to the question of humidity interfering with the GT’s beam in those shots should be that the air had snow in it or was less than 10% humidity.
Edit: It should be declared that I know squat about 0º air temps. I’ve ridden my 750 to work in 12º weather before and worked outdoors, but that was a very rare situation here. Thus my confusion about humidity and zero degree temps. Thanks for bearing with me…
Oh, and the chart I posted is based on Celsius, so it would need a –17.7 degree C rating to equal a zero here in the States.
They also don’t like us doing them either. Everytime we have tried to share it over there the thread is locked inside a few hours even though it gets a great response over there.
For the record, I removed the head of my GT and de-soldered the negative lead from the board, soldered in an 18GA loop so I could test actual emitter amperage. At the top of the ramp it is getting 1.93A, by double clicking to Turbo it is getting 2.45A.
My light box shows 2049 lumens. I do not know the actual binning of the emitter I swapped in, but I do intend to buy a replacement of known binning.
I’ve been wanting to do some distance testing with it since our humidity is totally absent right now. Thursday night it was –25°F, Friday it was –20, last night still below 0. The problem is finding a place to test it in rural Maine. It should stay dry for all of next week too.
I’ve been giving this some thought. A few miles away there is a straight road that runs between two huge cornfields. There are buildings at the end of it. But I never “clocked” the distance. I just checked Google maps and it’s over a mile long.