*BLF LT1 Lantern Project) (updated Nov,17,2020)

As of right now I am in need of a replacement LH351D 4000K High-CRI emitter to test the lantern using four to compare that configuration over the two-LED set up. DO any one have any sources where i could get one?

Good news is Digikey can get them, bad news is the standard lead time is 6 weeks.

Looks like a group buy is happening here on BLF

I posted in the BLF thread looking to see if someone can provide one or a couple to you for this project.

No worries, I’ll send him some today.

I will be on my long trip in 2 weeks, ( leaving on June, 5th) and hope to do better field testing on that trip.

Perhaps BlueSwordM will get you some parts prior to your trip so you can do some real “field” testing :wink:

Much appreciated it!

he will save the day :slight_smile:

Here is a short video showing when i press in on the dome in the corner of the bad LED, it flickers on for a second:

My best guess, not enough solder during reflow.

Interested for 1!

I want to thank everyone that put time and effort into this project. I really appreciate it.

Looks like you’re good for now, but Digi-Key actually has 8 varieties in-stock with no minimum. Different CRI’s (70-80) and CCT’s (3000-5700) available. Link

Which is problematic. No 90CRI available.

Also, we have AEDe which can supply Thorfire with full reels, so no problems there too. Hopefully of course :stuck_out_tongue:

:person_facepalming: Sorry, just catching up on the thread. Didn’t realize that 90 CRI were being used. Carry on!

There was, I removed it and re-flowed it again on to a standard 16mm star & it had the same problem. Likely a defective bad LED.

put you down for two barretttx (768 and 774) until you say otherwise, and added Basuini888 at entry 772 and 773 also.

Also added entry 775 for slowtechstef

sorted by entry number

sorted by user names

So who is going to get lucky 777?

I sent him the LEDs. The project can continue uninterrupted.

My name is cu42 and I approve of this message!! high CRI fan here.

I never put much thought into whether any high cri could be more efficient at medium outputs since as a newb I am always focused on the max numbers.

I was originally thinking the warmer 3k was the way to go for a camp lantern, but now wondering if high CRI at 4k would be more desirable than lower cri warm tint? Is there even such a thing as warm high cri?

Last I checked, daylight tends to be around 5500K mid-day, but it gets warmer in the morning and evening as the sun gets low in the sky. At sunrise/sunset it can be below 2000K. Moonlight tends to be around 4000K, but is generally too dim to activate cones for color perception.