Historical Economics of Lighting

12 posts / 0 new
Last post
Phlogiston
Phlogiston's picture
Offline
Last seen: 1 week 5 days ago
Joined: 10/27/2016 - 16:57
Posts: 970
Location: Scotland
Historical Economics of Lighting

I’ve just read a BBC web article about the economics of lighting throughout human history, which I found quite interesting:

http://www.bbc.co.uk/news/business-38650976

The Miller
The Miller's picture
Offline
Last seen: 1 year 4 days ago
Joined: 12/14/2015 - 12:08
Posts: 9908
Location: Charente France

thanks! nice read

Bort
Bort's picture
Offline
Last seen: 2 weeks 23 hours ago
Joined: 06/01/2012 - 17:15
Posts: 7460
Location: Holding the proverbial flashlight

Fascinating, i always wondered at the light output of a candle, though i assume 13 lumens is not gospel
My unanswered question is how many lumens per watt is it?

I would be interested in an efficiency comparison, a wood fire compared to a 100lm/w LED bulb.

The Journal of Alternative Facts TM

"It is critical that there is a credible academic source for the growing and important discipline of alternative facts. This field of study will just keep winning, and we knew that all the best people would want to be on board. There is a real risk in the world today that people might be getting their information about science from actual scientists"

 

keltex78
keltex78's picture
Offline
Last seen: 6 months 2 days ago
Joined: 03/18/2011 - 10:15
Posts: 3705
Location: Texas

I’ve read before that a candle burning is about 80W. Based on the 13 lumens number, we can estimate .1625 lumens per watt.


Keepin’ the “B” in BLF

Don wrote:
It sounds like the XM LEDs won’t really be suitable for flashlight use. Pity…

Bort
Bort's picture
Offline
Last seen: 2 weeks 23 hours ago
Joined: 06/01/2012 - 17:15
Posts: 7460
Location: Holding the proverbial flashlight

keltex78 wrote:
I’ve read before that a candle burning is about 80W. Based on the 13 lumens number, we can estimate .1625 lumens per watt.

You are correct, thank you Smile
https://en.wikipedia.org/wiki/Candle#Light

The Journal of Alternative Facts TM

"It is critical that there is a credible academic source for the growing and important discipline of alternative facts. This field of study will just keep winning, and we knew that all the best people would want to be on board. There is a real risk in the world today that people might be getting their information about science from actual scientists"

 

Firelight2
Firelight2's picture
Offline
Last seen: 10 hours 3 min ago
Joined: 04/08/2011 - 15:17
Posts: 4176
Location: California

Great article.

Thanks for the link

Phlogiston
Phlogiston's picture
Offline
Last seen: 1 week 5 days ago
Joined: 10/27/2016 - 16:57
Posts: 970
Location: Scotland

I’m glad you enjoyed it Smile

I’ve just been reading Bort’s Wikipedia candle link and wandering off along the links it gives, so thank you in turn! I had no idea there were so many ins and outs surrounding something as seemingly simple as a candle…

Bort
Bort's picture
Offline
Last seen: 2 weeks 23 hours ago
Joined: 06/01/2012 - 17:15
Posts: 7460
Location: Holding the proverbial flashlight

Phlogiston wrote:
I’m glad you enjoyed it Smile

I’ve just been reading Bort’s Wikipedia candle link and wandering off along the links it gives, so thank you in turn! I had no idea there were so many ins and outs surrounding something as seemingly simple as a candle…


thanks, i never knew i would be reading about candles till this thread came along Wink

The Journal of Alternative Facts TM

"It is critical that there is a credible academic source for the growing and important discipline of alternative facts. This field of study will just keep winning, and we knew that all the best people would want to be on board. There is a real risk in the world today that people might be getting their information about science from actual scientists"

 

Splott-Light
Splott-Light's picture
Offline
Last seen: 17 hours 4 min ago
Joined: 08/20/2015 - 20:15
Posts: 254
Location: Just Outside of England

@ Phlogiston,

Many Thanks for the link.

Interesting article.

I make “Melt and Pour” jar candles and add scents to them as a hobby, so appreciate how time consuming it can be even with modern methods and materials!

Thankfully we have LED’s for light!

Cheers,
S-L Smile

Ouchyfoot to a New Member: Welcome CJ. Now you have to learn about buying an inexpensive flashlight and modifying it until it either blows up, or starts small fires on the moon…………

Hugh Johnson:
I, too, once lived a tragic and empty life. Then I found [portable] light.
You forgot to mention clothes. I sold most of my clothes to fund my light collection. This is actually fine, since I only go out after dark, and most people can’t see me.
Finally, I got my priorities straight.

Lumenlover
Offline
Last seen: 3 years 9 months ago
Joined: 01/12/2017 - 07:46
Posts: 21

Cool! I enjoyed that, thanks.

Mkduffer
Offline
Last seen: 2 months 3 days ago
Joined: 12/19/2015 - 02:31
Posts: 447
Location: Island of Hawaii

Highly illuminating. Big Smile Thanks for the share.

People say I’m a flashaholic like it’s a bad thing…

alice_1
alice_1's picture
Offline
Last seen: 3 years 6 months ago
Joined: 12/12/2016 - 21:58
Posts: 7

Nice read! Actually, I replaced all old bulbs at my home with LED light bulbs. It cost me much less on electricity bill last year.
I hope LED lights could make further progress to save energy and cost.