I agree on that, basically it’s a linear combination between the 7135 and the fet, so I expect the efficiency to lower continuously down to the direct drive efficiency
Thanks to all involved in the creation of this little monster …
Arrived today:
I will definitely use it with Sanyo GA( Is more than enough for me) . It is a hand burner in 15 seconds, even after the step down …. I will have to reset the “thermostat” of the flashlight I love it !!
I think the light’s dark front area may have eaten some lumens compared to a light which doesn’t have that. After recalibrating for that effect, I think it may have been doing 3241 lm instead of 2818.
The graph a few posts ago (with 4848 lm) was done after recalibration, and both lights were measured with the same setup to keep things consistent.
I wanted to see how the shape of the output curves compared at a similar level of power per cell when thermal regulation wasn’t a factor. It seems the Meteor is partially regulated at first, then drops off starting at a fairly high voltage. This continues until it gets down to a pretty low level, and then it blinks to indicate low voltage. The D4 has more of a typical direct-drive (ish) curve until it detects low voltage, at which point it blinks and steps down to a stable regulated level. Although not shown in the graph, it then stays until voltage is low again, and repeats the blink-and-drop. After doing this enough times to reach the lowest level, it finally shuts off. Based on other tests, it looks like the first stepped-down level would probably last 30-40 minutes, extending off the right edge of the graph, and then the next level might take even longer, so I didn’t wait for those.
The Meteor has more area under its curve in this test, though it’s not clear how much of that is due to a more efficient driver vs more efficient emitters (D4 used 219c, which is significantly less efficient in this configuration). But while the Meteor was running at maximum output the whole time, the D4 was at only 1/3rd its maximum power. It’s a bit like comparing a commuter car to a race car. They are good at different things.
I honestly can not stop touching the D4. Fiddling, fiddling, fiddling… fiddle… fiddling, fiddling, fiddling… Hold on gonna get some coffee.
(1 minute later) I’m back. Fiddling, fiddling, fiddling…
Got shipped from intl-outdoor (219c) on july 31, paid for a tracking (hk post), until now, the tracking is not found… Ordered another one (xpl hi) from intl-outdoor 2 days ago, paid for the tracking, didn’t received tracking number, send 2 emails, no response. I am a little bit worried about intl-outdoor,
I got my tracking number after 5 days of order placed and shipping notice on the 10th day, i should received my D4 today if not then it should be on Monday. So total transit time 14 days not bad. Could be the worst weekend for me :disappointed:
Hank is a trusted seller here, dont worry you’ll get your D4 it just take time.