LED Lighting Lunacy

I recently put together a co-working space in my rural hometown (post coming) as an alternative from my old work-from-home model.

As part of this exercise in dressing up an ancient tin-ceiling storefront it really drilled home how important effective lighting is in my work space for the entire room (and not just the economical task light).

I was looking for this, but couldnt find it so I crunched it myself. Here’s the history of artificial light in one graph.

Note the logarithmic scales for the intended perspective.

So, what have CFLs and LEDs done to my power bill? What do they mean to ancient structures like this one? Do people save money or use more light?

This ceiling fan now holds three (thanks to a nifty splitter) 1500 lumen LED bulbs from Phillips (4500 lumen) and draws 45 watts. The original incandescent drew 60 watts and threw 800 lumen.




lighting Common Use (years ago) Labor Price (hours of work per 1,000 lumen-hours) Hours of light (1,000 lumens) per 1 hour labor
Open Fire 1422000 58.000000000 0.0172
Neolithic Lamp 40000 50.000000000 0.0200
Lamp Fuel Market (fuel trade) 4000 5.940000000 0.1684
Improved Candlesticks (chemistry) 186 3.000000000 0.3333
Town Gas (coal-gas) 141 0.326000000 3.0675
Kerosene Lamp
141 0.225300000 4.4385
Electric Lamp (Incandescent) 106 0.092000000 10.8696
Electric Lamp (CFL) 24 0.000119000 8403.3613
Electric Lamp (LED) 0.1 0.000069617 14364.2708
3200 lumens
0.126 kwh
25.73 labor hour price
11 bulb price
25000 lamp life
42 watts
1050 lifetime kwh
132.3 lifetime energy price
0.005292 energy cost per hour
0.00044 bulb cost per hour
3.2 brightness factor (*1000 lumens)
0.00179125 cost per 1000-lumen-hour
0.000069617 labor hours per 1000-lumen-hour