How spiral compact fluorescent bulbs are formed.
Drone changing a lightbulb - GIF
Very Cool machine. Would love to see more of it...coating, gas injection, termination and sockets. Now we know why they are still relatively expensive. Thanks Jon, always a good mind spark!
Home LED's are being color/temp referenced (marketed) now and got some for the bathroom fixture a while back but again they are a bit jaring, off temp a fair amount and done with filter materials in the globe.
A little reference for color temp.
Here is a Planckian Locus chart from wiki on color temps.The three primary types of color temperature for light bulbs are: Soft White (2700K – 3000K), Bright White/Cool White (3500K – 4100K), and Daylight (5000K – 6500K). The higher the Degrees Kelvin, the whiter the color temperature.
The CIE 1931 x,y chromaticity space, also showing the chromaticities of black-body light sources of various temperatures (Planckian locus), and lines of constant correlated color temperature.
Jon (Dec 3, 2018)
I'm not exactly certain that this is the single most useful tool in all of human technology. However, still interesting. I will say that LEDs have improved with "warmer" light spectrums, and are certainly cost-effective, but, all other things being equal (they're not), I still prefer the light quality of incandescents. I wonder if this is objective or just a relic of my past lighting experience. For example, when light bulbs first came into prominence, did people denounce their light quality as inferior to candles?
I would bet the candle people would have complained for a while, but being able to light a larger space probably changed their minds quickly...yet we still use candles as mood lighting and ambiance.
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