Drew
Akshat RathiShare of energy consumed that is converted to light:
Candle: 0.01%
Incandescent bulbs: 1%
Fluorescent lights: 15%
LEDs: 90%
Took less than 150 years to increase efficiency 9000-fold.
Christoph Becker@akshatrathi yes and yet, "global energy use for lighting has experienced 100% rebound over 300 years, six continents, and five technologies" https://doi.org/10.1016/j.enpol.2012.06.050
#Rebound means that energy efficiency improvements are offset by increased usage, a common phenomenon in many fields including lighting, energy, transport, production, and nowadays, #AI and #generativeAI.
Tim Ward βπͺπΊπΆ #FBPE@cbecker @akshatrathi Except for hotel bedrooms and holiday cottages, where it is really quite uncommon for there to be enough light to read by.
Geoff π΄σ §σ ’σ ³σ £σ ΄σ Ώ@akshatrathi No idea what the number is for the Sun, but it's got to be low?
David Zaslavsky@_thegeoff @akshatrathi I suppose you could calculate it by integrating the blackbody spectrum over the visible range
jesterchen42@akshatrathi And graphene is at... 99%? I remember having read about graphene having 10% better efficiency than "classic" LEDs, but I couldn't find reliable data during quick googling at night...