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VU1 phospor turning on (animated gif)

VU1 phospor turning on (animated gif)


This is an image of the VU1 R30 turning on. Note that there's a "sweet spot" almost like burn-in on a normal CRT, (perhaps the opposite of) which lights up first, like an old B+W CRT turning off (sort of in reverse). The beam then spreads to the rest of the phosphor surface and settles in, also forming the "woven" pattern that is apparently projected onto the phosphor.

vu1-2.png vu1-3.png vu1-turnon-opt3.gif vu1-sizecompare.png

Light Information

Light Information

Manufacturer:VU1
Model Reference:R30
Lamp
Lamp Type:BR30
Filament/Radiator Type:"ESL" Cathode Ray + Phosphor
Base:E26
Shape/Finish:BR30
Service Life:11000h
Fixture
Fixture Type:N/A
Ballast Type:Self/Internal
Socket Type:N/A
Arm Type:N/A
Electrical
Wattage:19.5
Voltage:120
Current:163mA
Optical
Lumen Output:500
Lumen Efficacy:25lm/watt
Color Temperature:3000k
Color Rendering Index:90
Physical/Production
Dimensions:6x4in
Factory Location:China
Fabrication Date:2015
Application/Use:Downlight

File information

File information

Download: Download this File
Filename:vu1-turnon-opt3.gif
Album name:michilumin / Modern / HighEfficiency lighting
Rating (1 votes):
Keywords:Lamps
File Size:892 KB
Date added:Apr 02, 2015
Dimensions:480 x 360 pixels
Displayed:97 times
URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-106780
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themaritimegirl
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themaritimegirl themaritimegirl themaritimegirl
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Apr 02, 2015 at 07:24 PM Author: themaritimegirl
Neat. Also, I didn't know GIFs worked here.

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Apr 02, 2015 at 07:29 PM Author: michilumin
Neither did I, and I'm new - so I'm glad I didn't make a fool of myself! And, happy that they do as I want to show some high-FPS-recorded arcs and some SBMV startups.
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Apr 02, 2015 at 07:35 PM Author: nicksfans
I think this is the first GIF I've seen here. We need more.

I like my lamps thick, my ballasts heavy, and my fixtures tough.

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dor123
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Apr 02, 2015 at 09:08 PM Author: dor123
It is strange that the light begins at the center and then diffuses to the rest of the lamp. I've expected that the lamp would be brighten evenly, like in the case of the old CRT TVs and computer displays (This lamp is actually a cathode ray tube).
But I think that a video shows better the exact time this lamp takes to warm up at turning on. The gif only shows how the run-up itself looks like, but not how much time it takes.

I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the European date format (dd.mm.yyyy).

I lives in Israel, which is a 230-240V, 50hz country.

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michilumin michilumin
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Apr 02, 2015 at 09:14 PM Author: michilumin
Actually the gif is 1:1 in time to the video. Less frames, yes, but gif allows for time-per-frame to make up for it. It's not 'time-lapse', this is the actual speed of the run-up.
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Apr 02, 2015 at 09:21 PM Author: dor123
Ah.

TheMaritimeMan said: "Also, I didn't know GIFs worked here." @TheMaritimeMan: Gif is stll an image and not a video, despite it is animated. so it should work in any place.

Anyway: There are problem with these GIFs: They are very heavy and large (Few MBs, much like several of the AVI and MOV videos that members uploaded directly to the site, before Youtube era). So I suggest in the next time, not to use animated GIF images, but Youtube videos, so they will be only few KBs or even bytes, as the actual video is on Google servers and not on this site servers.

I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the European date format (dd.mm.yyyy).

I lives in Israel, which is a 230-240V, 50hz country.

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michilumin michilumin
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Apr 02, 2015 at 09:34 PM Author: michilumin
Well, I'll try that with youtube links -- I'm new here so I don't want to offend or wear out my welcome... However - just to note - these I generally run through an optimize pass and should be <1mb, more like 700k or 800k (This one is 892k... and only because I wanted to capture that spreading of the beam on the phosphor..) There's also no audio stream. So while they are heavier, I admit, than some photos, they don't quite reach into AVI/MOV territory. But I understand this is a small site so I'll try to optimize the existing ones more, save the gifs for really interesting stuff and try to set up a youtube channel otherwise..
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Apr 02, 2015 at 11:40 PM Author: merc
Nice startup demonstration of an intersting lamp!
IMHO, no problem with an 892K GIF. (Much more meaningful than 10 pictures of the same fixture at once.) But yes - a video on the YouTube is more convenient for everyone.

Btw. it's possible to have an animated GIF in your avatar (as you can see) - I hope it's not too annoying for anyone. It's going to be improved soon but I didn't find "time" to do so yet.

Not a misoLEDist...

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GoL the.baus.of.all.bauses UCDl2EWWZc9h1IZXcfGU9OZA nicksfans
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Apr 02, 2015 at 11:45 PM Author: nicksfans
Yeah, 892K is smaller than a lot of the JPEGs on here.

I like my lamps thick, my ballasts heavy, and my fixtures tough.

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Medved
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Apr 03, 2015 at 12:00 AM Author: Medved
The lamp starts at spot, because with lower currents (the cathode does not emit well yet) there is not much force to spread them from the main electron beam trajectory. But as the electron density increases, the repelling electrostatic forces become so strong, they spread the beam over the complete screen.

It is this effect, why the CRT's and mainly the electron beam microscopes need so high acceleration voltage: The electrons have to move so fast, they have no time to spread from the focused beam needed for proper sharp image and good resolution.
With this lamp the requirement is then exactly the opposite...

No more selfballasted c***

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Apr 03, 2015 at 05:43 AM Author: themaritimegirl
Ah, of course - welcome!

"Gif is stll an image and not a video, despite it is animated. so it should work in any place."

Not the case. YouTube used to allow animated GIFs as profile pictures, but they don't anymore (only static ones), so you can't expect them to work everywhere.

"So I suggest in the next time, not to use animated GIF images"

The 4 MB limit still applies here. If they're within the 4 MB limit, they're fine.

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Apr 04, 2015 at 01:29 PM Author: michilumin
Thanks guys -- I hope to get more run-up videos/animations (in whatever the format) in the future.. I have some SOX that I really want to try to get all the colors of properly with my (now starting to age) Canon DSLR. Really jealous of all of your multi-color-temp/coating fluorescent collections in your profiles.
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