Mass is caused largely by that super thick and heavy shelf. Which is worth well under 10% in sustained output. And not because of thickness but because larger head has larger surface. Well, strictly speaking thicker shelf reduces thermal resistance and therefore reduces LED temperature. But that’s well under 1%.
Thicker shelf avoid bottleneck to the fins that where reworked to increase the surface of exchange with air by convection. With the final prototype, heat has a better thermal path and larger surface for being evacuated = higher sustainable output. Right ?
It was redesigned, not to improve compacity but thermal management, and there isn’t 36 differents ways to achieve it with passive cooling, isn’t it ?
I was responding to Ektasis that no, it wasn’t designed and redesigned for maximum compacity. If it has this final shape, it is for better thermal management, or I missed something reading this thread since day1.
You don’t need it to be 1 cm thick to not be a bottleneck. 5 mm would be overkill already.
Wrong and right. Thermal path has little to do with sustained performance. Larger surface is a biggie. What matters is ability to evacuate heat out of the light. So conduction to user hand, convection from the body and radiation from the body.
Strictly speaking better thermal path makes the led run cooler. And cooler means more efficient. And more efficient means better sustained performance. But that’s purely marginal.
Thanks. I’ll have to re-check that. You’d think that any required fields would be highlighted if not selected, rather than simply preventing the “Add to Cart” button from functioning.
Default ceiling is 120 (click 31 times after prompt). Max ceiling (= turbo) is 150 (1 click after prompt). Not sure what level default floor is set to, but lowest possible setting is 1 click after prompt.
I received my Fireflies E07 Friday of last week and it has a strange issue that my Fireflies PL47 has never had:
I will take a video to show you what’s happening but when I ramp up to the top of the ramp (not turbo) the light flickers very heavily and rapidly once it reaches the top of the ramp. This happens if I keep holding the button or if I release the button as soon as it reaches the top of the ramp. The flickering happens most of the time and can last anywhere from 2 - 10 seconds.
It also happens if I save the top of the ramp setting as the memory setting and turn the light off then on again.
Like I said, my PL47 doesn’t have this issue and is totally stable once it reaches the top of the ramp
Get some 80-90% alcohol and clean any copper parts or non anodized metal (driver ring, tail pcb ring, springs, battery tube ends and finally your battery + and - terminal)