Help me with LEDs !

[Paul-R]

Hi dear all !

I want help me on this forum that : Which type of LEDs both captures and emits the most efficient light? Thank you very much !

This is very difficult to answer because the industry is changing so quickly. Check the manufacturers' specs for their candela and luimen numbers.

As for all the bickering above, please bear in mind, TG, that the arbitrariliy imposed convention for current flow, set years and years ago, got it wrong. It is a substantial scientific embarrassment.

If the cionvention says clockwise, the reality is anticlockwise.

[lancaIV]

From 100% question orientation related conduction : sol-lector,sollector Lightconductor
Remembering,knowing this (!?) : https://translate.google.com/translate?sl=auto&tl=en&u=https://www.experimentis.de/physikalisches_spielzeug/optisch-optik/glasfaserlampe-glasfaserleuchte-lichtleiter/

here as "diode"
https://translate.google.com/translate?sl=auto&tl=en&u=https://www.welt.de/wissenschaft/article13475451/Sollektoren-fluten-die-dunkelsten-Ecken-mit-Licht.html
Almost a fifth of the world's electricity demand is used for indoor lighting, including during the day. It would be particularly effective in southern countries, but in Germany too, the sun shines for an average of 1700 hours. With the use of collectors, almost 1200 kilowatt hours of electrical energy could be saved. So you would have to equip almost 20 times the area with photovoltaics in order to transport the same amount of light in the building.


                         http://4.bp.blogspot.com/-KeJtLVh9mjw/Tmv_iMxlxII/AAAAAAAAeas/39fxu1mvuUM/s400/013_left_column_01.jpg


https://translate.google.com/translate?sl=auto&tl=en&u=https://www.wohnnet.at/wohnen/licht-schatten/sollektor-23231



alternatively,other "sollector"  ideas :
https://www.google.com/search?client=firefox-b-d&lei=Vo4BYLnbGfeBjLsP5PCwgAE&q=sollektoren&ved=2ahUKEwi53pjx-53uAhX3AGMBHWQ4DBAQsKwBKAB6BAgZEAE&biw=1366&bih=633

https://translate.google.com/translate?sl=auto&tl=en&u=https://www.basf.com/global/de/media/news-releases/2019/10/p-19-361.html


https://patents.google.com/patent/DE4411067A1/en BASF,Makrolon light concentrator,L.I.S.A.
works like : https://pubs.rsc.org/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=C1EE02376D&imageInfo.ImageIdentifier.Year=2012
source :  https://pubs.rsc.org/en/content/articlelanding/2012/ee/c1ee02376d/unauth#!divAbstract




https://www.google.com/search?source=univ&tbm=isch&q=light+concentrator&client=firefox-b-d&sa=X&ved=2ahUKEwj94aGg_53uAhVlQUEAHTOhDpIQjJkEegQIARAB&biw=1366&bih=633

https://xpic.x-mol.com/20180824%2F10.1021_acsphotonics.8b00498.jpg  Diode emitting lumen/Watt and colour dependence !

From electricity deliverer to light deliverer ! THE CHANGE ! Conversion : light to electric converter - in situ - !
Glas fiber : cable TV !

[tonygiang]

I found this video:
https://www.youtube.com/watch?v=O33cfZBlEDI&t=6s

[lancaIV]

tonygiang,hello !
proof of idea ,but uneconomical !
86 mA x 5V = 430 mVA or 0,43 W ! Wp ?

By now 20 cents/Wp for commercial solar cells fob factory this self constructed LED-board by given output is :  +- 10 cents worth !
Measured by % full shiny weather outside ? Why he did not artificial light tests !?

https://en.wikipedia.org/wiki/Sunlight
Direct sunlight has a luminous efficacy of about 93 lumens per watt of radiant flux. Multiplying the figure of 1050 watts per square meter by 93 lumens per watt indicates that bright sunlight provides an illuminance of approximately 98 000 lux (lumens per square meter) on a perpendicular surface at sea level. The illumination of a horizontal surface will be considerably less than this if the Sun is not very high in the sky. Averaged over a day, the highest amount of sunlight on a horizontal surface occurs in January at the South Pole (see insolation).
Dividing the irradiance of 1050 W/m² by the size of the Sun's disk in steradians gives an average radiance of 15.4 MW per square metre per steradian. (However, the radiance at the center of the sun's disk is somewhat higher than the average over the whole disk due to limb darkening.) Multiplying this by π gives an upper limit to the irradiance which can be focused on a surface using mirrors: 48.5 MW/m².^[8]

intensifier technology example : https://www.offgridenergyindependence.com/articles/19735/low-cost-intensifying-solar-panels

http://www.redrok.com/main.htm#gsc.tab=0





wmbr
OCWL

[tonygiang]

Hi LancaIV !
I don't need very high performance, I mean is : a compact, not expensive durable self-powered dc power supply ...! Of course we already know there are other possible better designs: like as JT circuits. Because it's just input, self-running forever, low heat generation, cheap and durable because it needs 24/7 operation. I think it's important to get to FE. And then you probably know what to do!

Best regards!