Q8, PMS SEND TO THOSE WITH ISSUES BLF soda can light

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BrianK
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Tracerfire, I’m not going to get this 100% accurate, but I’ll get close…

In industry it’s a given that 90% of issues can be addressed relatively imexpensively, the other 10% are solved much more expensively. This light achieves over 90% IMO, and does it inexpensively. But that was achieved by the volunteers on the team keeping costs down (in more than one way). When it involves anything but volunteer labor from the team that becomes purchased labor and costs go up. Some things can be done relatively inexpensively, and other things drive up the cost. The goal was an excellent light for $40 shipped. I know you weren’t knocking the light or anything else, but when one figures out what this light is and that it was accomplished for $40 shipped, that’s just amazing!

Tom, in looking at the coated lenses I saw the difference in thickness also and was going to ask about potential problems. Thanks for beating me to it! I think I’ll just live with the stock lens. Frankly, I’m not planning on doing anything to the light at all.

MrsDNF, OK, don’t go swimming with it, but it would be OK in the rain like any other quality LED light? I just want to make it clear for my pea brain. I think that’s what I got from your statement regarding sealing. (About the water, not my pea brain Big Smile )

TIA

The Miller
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Yes the goal was a good SRK like light with nice LEDs, BLF software, square threads connecting tube and head so it can be used for a long time.
Then the 4000 lumens were specified
And we have reached these goal and beyond.
A big copper DTP ledboard was a mere dream, lighted switch was ditched from specs to save costs yet TF did it, double springs, tripod hole…

This switch is neat, the rubber translucent part is both to press on but it is shaped in such a way the ring holding it presses on a part below it so it acts as waterproofing as well, yorlur typical SRK switch has a loose metal button and is much less capable of resisting water.

Good news, roof is fixed, needed to replace 2 tiles, saw a cracked one a couple of meters away so in the end replaced 7 tiles and it should be good now. Since I was up there and had some shards I could also clean the top of the chimney pipe and concrete slab that acts as roof for it. So got rid of a lot of creosote, nice!

Enelooper
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JasonWW wrote:
tatasal wrote:

So 4 10A GAs will sag lower than 4 30Qs if we are to really look at the difference in a graphing meter but I wonder how much difference to the human eyes…even with one 30q

No, not really. If your comparing 4 cells to 4 cells then you have to remember that each cell is only going to pull about 5 amps. I don’t think there’s going to be much difference in voltage sag at all between these 2 cell types.

I think one type pulled 20 amps and the other 18 amps? I can’t remember the details, but they were pretty close. I think it was a 500 lumen difference? 5500 lumen to 6000 lumen. Your not going to notice that small a difference with your eyes.

Now with a single 30q you’ll have less voltage and less amp draw which will add up to a much bigger lumen drop. You might see the difference with your eyes in this scenario.

Like I said, I hope someone can test this and give us actual numbers instead of theory.

For cost and weight reasons, I plan to use either one or two of my existing 4.35V LG cells, instead of buying another 4 new cells. I hope the max brightness doesn’t suffer too much.

DB Custom
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I just built a small light with a large emitter that required opening the emitter hole in the existing reflector so the reflector could sit all the way down onto the substrate. This effectively lowered the reflector approx 1mm. I solved this by removing the wire from a 20ga Turnigy wire leaving the empty silicone sleeve and then using this like an o-ring between the lens and bezel to, in effect, act like a spring to push the reflector down and keep the lens from rattling. Water sealing is from an o-ring on top of the reflector, between it and the lens, so this Turnigy sleeve is there only to make up the difference.

Easy to do, effective, and inexpensive.

I have some idea’s about boosting output on this light that I will implement and see what shakes once the light arrives. Wink

Dale

hank
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Yep, I’m also on the list for one.
Just nitpicking little stuff, which I trust comes to the attention of whoever’s doing QA/QC at the supplier.

For any good quality hardware host, I trust I’ll be replacing LEDs every year or two for many years to come.

BrianK
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Hank, just curious… why would you want to replace LEDs every few years?

blinker
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When are they supposed to come and how do we pay for it? (maybe I should have asked for 2 instead of just one)

Not a flashlight guru, but like them just the same.
Misspellers of the world UNTIE!!!

BrianK
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Blinker you can up your order to as many as you want. Eventually no one will be able to do that at the $40 price, but they’ll be available at full retail. But that time isn’t now.

When the time comes you’ll be sent an e-mail with instructions telling you how to order. There’s more to it than that, but it’ll all be made plain when the time comes.

blinker
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Thanks Brian.

Not a flashlight guru, but like them just the same.
Misspellers of the world UNTIE!!!

The Miller
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blinker wrote:
When are they supposed to come and how do we pay for it? (maybe I should have asked for 2 instead of just one)

Yes Brian explains it well
A link and code will be in the PM people on the list receive
We don’t know what price will be after the groupbuy, we don’t know how many runs will be made (I hope a lot) but I do know the first mass production run is going to be based on the amount spoken for on the list
There is no limited amount people can ask for now, there will be a system of several codes with limited use later which combined with trust that people order the amount they asked for should make it all work fine.

My first reaction was to say that you can just ask to be placed on the list again but it is all good, if people want more then they order initially the chance of TF seeing there is a demand thus making more gets bigger Smile

blinker
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What is the PM?

Not a flashlight guru, but like them just the same.
Misspellers of the world UNTIE!!!

DB Custom
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Personal Message, like email but within the forum. Wink

The Miller has all of us that have expressed an interest in buying one or more of these lights divided up in groups. He will send a link to make the purchase (as well as the coupon code to lock in the price) to groups of us at a time, in order to make it more efficient to “email” 1300+ people. When the lights are ready, we will be notified, and it will be up to us to only buy the one or two or whatever we spoke up for.

Dale

The Miller
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Yeah and when you receive a Personal Message on BLF you get an email telling you so.

DB Custom
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Not everyone has that option enabled Miller, so sometimes folks here do not get that email.

So, make sure you have email enabled to notify you of messages. Wink

Edit: On the left, click My Account, then Edit, then scroll down to the botton to Privacy, check the box for enable notification of messages. Wink

Dale

patmurris
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@The Miller: please add me for a second one – first is #55.
Thanks.

The Miller
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DB Custom wrote:
Not everyone has that option enabled Miller, so sometimes folks here do not get that email.

So, make sure you have email enabled to notify you of messages. Wink

Edit: On the left, click My Account, then Edit, then scroll down to the botton to Privacy, check the box for enable notification of messages. Wink


Thanks!

Yes patmurris, will do!

ToyKeeper
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djozz wrote:
good tint (it really seems 3D to me)

It’s amazing sometimes seeing people’s preferences for tint. There were a couple cheap zoomies laying around which appeared to have a 1-something and 0-something emitter, respectively. My sister liked it and snagged one, and she chose the 0-something tint because it looked brighter.

I can’t even call a 0 tint “white” any more. It’s so blue I’ve been tempted to use one to make an “ice blue” light saber.

Also, given a choice between a Nichia 219b 4500k 92CRI light and a XP-G2 ~5700K light (NW and CW L3 L10), she chose the XP-G2. Same reason.

OTOH, my mother filled her house with 2700K bulbs and doesn’t like 5000K bulbs. Everything there looks yellow to me.

I guess I’m the odd one out because I like daylight tints, 4500-5000K.

blinker
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Thanks so much for all your doing. I would like another one. I’m at 1306 now.

Not a flashlight guru, but like them just the same.
Misspellers of the world UNTIE!!!

XXX-Man
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5000K is best tint for me.
Don’t like yellow, and don’t like blue…

"With the first link, the chain is forged. The first speech censured...the first thought forbidden...the first freedom denied – chains us all, irrevocably."

My reviews:

Sofirn SF36 /// Thorfire VG10S /// Sofirn C8F

BrianK
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TK, it could be age or what one has for lighting in the home. I can see the difference in °K when a light is first turned on, but then I become immune to it. I make the claim that it makes little difference to me. Of course one that is hugely blue or yellow might bother me. We have a floor lamp next to my chair that has a daylight LED bulb for area lighting, and the reading light is warmer. I can see it when they’re both turned on, then nothing, it’s just light unless I look directly at the bulb.

Yeah, I don’t claim to understand it in depth. I bet your mom is accustomed to low wattage incandescents and doesn’t want to change. Personally, phooey on those days. I if want those days I’ll cut the power and bring out the kerosene lights. Yeah, that’s not happening unless it’s TEOTWAWKI and my PV system has pooped itself.

DB Custom
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Older people spent more time with orange tinted incandescent lighting, it’s “normal” for them. They feel like a daylight white is burning too much electricity and turn it off.

I like daylight white myself, as close to pure white as I can get it without any tint one way or another.

Edit: Should also add that once I find it white to my liking, I like to make it bright enough to burn through your eyes and come out the back of your head. Big Smile

Dale

stephenk
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I prefer warm white home lighting and I’m not old!

DB Custom
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Ativistic memories. It’s said that when we lived in caves and/or camped out, the firelight was our only source of light and we all know what color that is. So our ancestral beginnings conditioned us to have warm white lighting, it is even said that it starts us off towards bedtime, the gradual decline of our lighting condition prepares us to call it quits.

Nowadays it simply isn’t so, but the age old preference for warm white household lighting is still strong in a great many, even those that can’t admit they are aging, gracefully or otherwise. Wink

Dale

hank
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> why would you want to replace LEDs every few years?

The rate at which they’re being improved is awesome; the old saying “nothing gets old faster than computers except fresh fruit” could apply to LEDs too.

> warm white … sleep

There is much good and very recent science on that subject:
https://www.google.com/search?q=blue+light+sleep
https://scholar.google.com/scholar?oe=utf-8&um=1&ie=UTF-8&lr&cites=15026...

You likely learned about “three color receptors” for vision. Turns out there are four receptors.
We have that receptor. Dinoflagellates have the same receptor. It’s rather basic stuff to how life works, evolutionarily very old.
Life adapted to blue daylight skies a long, long time ago.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2831986/

Looping back to the first question — one thing I often do is replace white LEDs with amber emitters, to use at night.
And those too have been improving rapidly as the market for sleep-protecting illumination begins to develop.

DB Custom
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On the opposite side of some of this theory, if I have to work into the night cutting up a felled tree to clear a road or looking for a lost puppy, whatever, I don’t want warm white light making me sleepy! Silly

Dale

hank
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Yep, Dale — light with the peak output right at the blue-green spike that “white” LEDs emit is the key to keeping you wakeful and alert.
I had a 7-year-old neighbor who discovered this himself, long ago. He told me he was sneaking his under-the-blanket late nighttime video gaming/reading using a blue LED penlight because it kept him alert.

Takes a couple of hours for most people after the last exposure to blue-green light before the body starts letting melatonin accumulate and sleepiness begins.
And it takes very little ‘white’ light to reset that 2-hour countdown clock.

I’ve read that the amber night lights are very helpful to parents who want their babies not to stay awake after nighttime feeding, too.

https://www.google.com/search?q=melatonin+wavelength+LED&source=lnms&tbm...

Jtm94
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I definitely prefer light on the warmer side of neutral. I like the compact fluorescent bulbs for being energy efficient, but they start at a warm white and go to a harsh white. Glad led bulbs in nice warm tints are available at an affordable price now.

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hank wrote:
There is much good and very recent science on that subject…

Indeed, there is. Blue light activates the IPRCGs, which tells the brain to make wakey-wakey chemicals. In most people. About 19,997 out of every 20,000 people, really. I’m one of those other 3. And, statistically, the other 2 are blind. So I’m … nocturnal. And morning people are weird.
ToyKeeper
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Anyway, the smoke grenade pouch showed up and fits my SRK well. Shipping was stupid-fast too. I ordered on Saturday and it arrived on Monday. Considering USPS has Sundays off, that’s like one-day shipping.

I suppose it sort of fits my BST too, but it doesn’t slide in far enough to reach the bottom, and the velcro is a bit short for a good grip. It’s still usable, but not ideal… a shallower or wider pouch would work better. What this one really needs is a Q8.

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DB Custom wrote:
Ativistic memories. It’s said that when we lived in caves and/or camped out, the firelight was our only source of light and we all know what color that is. So our ancestral beginnings conditioned us to have warm white lighting, it is even said that it starts us off towards bedtime, the gradual decline of our lighting condition prepares us to call it quits.

Nowadays it simply isn’t so, but the age old preference for warm white household lighting is still strong in a great many, even those that can’t admit they are aging, gracefully or otherwise. Wink

D@&$ right Dale, you won’t hear me admitting it!

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