And I like this. I donāt need even charger, but IPx8
I can reflow leds easily. So I like 4000K, but can agree with any CCT.
T1 is not simple , not efficient, and not durable. I already have butch of such lamps.
It is worth investigate interest to simple version. And may be launch it after main project. This allows not to split the efforts, and second version would be born much faster.
The beauty of this UI is that you can have those modes, and I can have ramping. 3000K is mandatory for a lantern, and with temp changing we can have that and 5000K, and everything in between.
Yes, exactly. Especially since itās pretty much already implemented.
Thatās why the temp ramping is so wonderful, no need for LED swaps (unless youāre wrong and prefer cool white, lol).
Thatās fine, but itās not needed for most since a wide range of temps are covered. Those with the ability can, and those that canāt still have a good range. With the ramping, even with swapping the LEDās you get a more versatile light.
The Nichia E21A is the better choice. It has a similar CRI (R9080), a tint under the BBL or on it, is available with every conceiveable CCT (2000K-6500K) and is more powerful compared to the Optoslis (less LEDs required). Here are Maukkas tests. This would require the use of a pcb with a special insulation material that has a low thermal resistance like Clemence and led4power use (should not be a problem cost wise since we need to get a pcb made anyhow). It would have the added benefit that we can put the FET onto this pcb to improve its heatsinking substantially (like led4power does). In my eyes this is the most elegant design.
As djozz has already mentioned tint is more important than ever higher cri ratings. The E21 R9080 LEDs offer a great tint.
The Optisolisā lower output / lower max amps can be fixed by using more of them. Spreading the emitting surface is not a problem for a lanternā¦.quite the opposite in fact.
That said, Iām not voting for any emitter change, Iām fine with LH351* as well as E21 / Optisolis.
You canāt really see the difference between R9080 and R9090. Thats a tiny difference.
Also, the 5000K Optisolis that Maukka tested was above the BBL. So even these arenāt perfect.
Yes, but if we donāt use a boost driver we would have to put all those LEDs in parallel. Since they all have slightly different Vfs they would all be driven at different currents. With so many LEDs in parallel the lifetime of some of them might be reduced.
Pretty cool to use Optisolis leds. Half a year ago I suggested using a bunch of 3030 midpower leds and did not get much acclaim. In the current phase I do not think it is a good idea to change the led choice anymore. I hope that Sofirn can get their hands on some good tinted LH351Dās
Iām signed up for several lanterns and am really looking forward to these. The biggest thing I care about is durability since these will be used for camping and will be bumping around in trucks offroad, etc. I donāt need the power bank, I donāt need tint shift, I donāt need a lot of the cool options and features that will come with this lantern (although Iām not against them either). What I do want is durability first and foremost.
GhostofHarry, added you to the interest list at number 975
You definitely did, and I definitely didnāt add your second light, until you reminded me. Your second is number 976 on the interest, sorry for the oversight. :disappointed:
I donāt care about powerbank function, charging function is nice to have but I can live without it, tint change is also nice but warm tint is just as good, ramping is essential, no preset modes without ramping please. Two - or more - memorized modes is very nice to haveā¦ I used that with T1, one mode for ālocatorā use and a second for general use for example but all memorized modes should be user selectable using ramping (eg change preset by click, click and hold to change - ramp - brightness of current mode, click to go to next mode, click and hold to program that mode and so on.