I have ordered a R90TS,but my order is in the processing status till 24/05, because they try to fix a problem with the plastic case which is in the box.I think they start again shipping at 06/06.
You can’t manually turn on fans at any level. Just when flashlight is off. That is sadly limits the use of the 10K level. It is better to use 22k if you don’t mind the fan sound vecause the light is cooler in that level than 10k. At 22k I measured 50°C at head after 10 minutes.
Just made a test.
10K 15 minute run. It reached 81.8°C which is a lot! No fan kicked in. But it slowly decreased output in 1-2minute steps to about 85% in 15 minutes.
Started with full battery and the start temp was 21°C
And in the glass lens center I saw some condensation after test which disappeared after cooldown. You can imagine if the head outside was more than 80°C the leds could be easily above 100°C:
That’s really nice tracking graph. It tells us how the output behave.
But I find it strange the output drop in steps, not smoothly declining. Is it due to light meter resolution?
Did the 22k lumens output level drop like that too?
The hardest thing to set up exposure same as real life. Because your eye pretty much works as between locked and automatic setting. So if you lock exposure at a low level (like 100 lumens) the levels like 5000 and above will be burned. If you set 10000 then 1000 lumens will be lower than real life. So that is why you need to compare apples to apples like I tried the MS18 with my second powerful light the MT03 TA.