11   Lamps / Modern / Re: UVA pumped LEDs?  on: May 01, 2026, 05:01:47 AM 
Started by Laurens - Last post by Laurens
Aah damnit.
Near zero chance to find them to add to the collection, i guess. Even 'plain' remote phosphor ones are hard to find locally.

By now UV and near UV leds have gotten pretty common so i guess it should be possible to see if production would be economically possible these days - if the efficiency would be acceptable.

It would be fun to experiment with remote phosphor stuff as a hobbyist, but so far i haven't come across vendors of the right phosphors in hobbyist amounts.

E: found this: https://img.archilovers.com/blog/3648_01.pdf
A CRI of 70 and 85 isn't that great in today's context. But i know for certain (i have some 2003...2009 LED lamps) the 80 cri common warm white-ish LEDs are absolutely ugly so they could definitely have been better than what was on the consumer market at that point in time.

Either way, i'd like to add somethng like this to my collection of oddball or historically significant LEDs. Same goes for the pre-Nichia era blue LEDs.
 12   General / Off-Topic / Re: Discord is rolling out age verification. Sadly.  on: May 01, 2026, 04:11:25 AM 
Started by HomeBrewLamps - Last post by RRK
On open source distros you are always in control to root out this sh&%, so no problem. Sorry for UK iOS users...


 13   Lamps / Modern / Re: UVA pumped LEDs?  on: May 01, 2026, 03:09:48 AM 
Started by Laurens - Last post by James
Indeed GE's VioLED is the only one I am aware of which became commercially successful, for a short time.  There was another company in Mexico that briefly produced A-line retrofit incandescent lamps with the same technology of a remote phosphor coated glass bulb around UVA LED emitters around 2012-2015, but they also quickly disappeared, and I forget the name.  UV-pumped technology is considerably better in terms of colour quality and colour stability, but has the penalty of higher cost and lower efficacy.  During the mid-2000s LEDs were developed with a view to achieving much greater performance than is commonplace today, until manufacturers realised that actually selling price and energy efficacy are the only things most consumers care about, and many of the innovations aimed at better quality of light had to be abandoned.
 14   General / General Videos / Re: Interesting phone with fluorescent backlight  on: May 01, 2026, 01:43:47 AM 
Started by LightsAreBright27 - Last post by RRK
In fact, such short CCFLs were in quite wide use to backlight industrial LCDs circa 1990's. Though, usually driven off classic Royer inverters.
I even still have one in 240x64 size, popular in synthesizers of that era.

 15   Lamps / Modern / Re: UVA pumped LEDs?  on: May 01, 2026, 01:09:35 AM 
Started by Laurens - Last post by RRK
GE did 405nm pumped high CRI white LEDs very very long ago under the trademark Vio LED. Probably forgotten now. 2009 story...

Violet and UVA pumped WLEDs would of course lose in efficiency to classic WLEDs considerably due to extra Stokes shift and extra conversion in blue light.
 16   General / Off-Topic / Re: Discord is rolling out age verification. Sadly.  on: April 30, 2026, 04:14:46 PM 
Started by HomeBrewLamps - Last post by ledozorant
I'm afraid that it applies not only to Discord. I think that introducing so-called "age verification" is global trend and will apply to more services (especially very popular ones) if not done so. There are even mentions of rolling out it at OS/device level. Projects such as GrapheneOS and some distros are against it. In contrast in UK iOS already started to prompt users to "verify their age".
 17   General / Off-Topic / Re: Severe weather never sleeps!  on: April 30, 2026, 03:56:22 PM 
Started by lightinglover8902 - Last post by lightsofpahrump
Dor123, WOWIE!
 18   General / Off-Topic / Re: Been to the ER!!!!!!  on: April 30, 2026, 03:54:52 PM 
Started by lightsofpahrump - Last post by lightsofpahrump
At this point the only reason I am still on LG is drama like this lol
My interest in lighting has turned into a broader interest for electrical engineering and electronics (but let’s face it, it was pretty much already like this, but I have learned a lot of useful information here and playing with lighting in general though)
I still like a collection of the big glowing things because I just find them cool, and I pretty much use LED and boring fluorescent exclusively.
By the way that's why I like lights too.I know this should be combined with my previous post but I'm too lazy to edit it LOL
 19   General / Off-Topic / Re: Been to the ER!!!!!!  on: April 30, 2026, 03:52:27 PM 
Started by lightsofpahrump - Last post by lightsofpahrump
Sorry for attention seeking behavior. I did not mean to cause problems or whatever. I was just trying to provide more info on a picture. By the way, I forgot to mention that I was actually REFERRED by an overzealous physician!  :poof:  WHAT THE WOW! I deserve a...dude, where's the slapping emoji?
 20   General / Off-Topic / Re: Been to the ER!!!!!!  on: April 30, 2026, 03:12:56 PM 
Started by lightsofpahrump - Last post by RCM442
Exactly, when I try and remove or lock topics that really shouldn't be here I get attacked for it! So I've just been leaving everything up!
Pages: < Previous Next > 1 [2] 3 4 ... 10
© 2005-2026 Lighting-Gallery.net | SMF 2.0.19 | SMF © 2021, Simple Machines | Terms and Policies