CFL globes here come in two kinds, Warm White (3000K) and Cool White (6500K). The numbers are the colour temperatures of the light.
So far I've only seen warm white LED globes, which probably won't give you high colour accuracy, as I suspect the cool white colour temp is the more accurate for midday sun colour. I read (in IEEE Spectrum iirc) that our use of cool white in offices all day leads to disrupted circadian rhythms as the mind is attuned to a more yellow colour morning and evening with the bright bluer colour associated with midday sun, hence the body expects to wake up to warm white, peak activity with cool white, and wind down in the late afternoon with warm white again. The article went on to point out that technology is rapidly approaching the point where the colour temp of artificial light can be programmed to reflect the natural changes in colour throughout the day leading to a better balance in life. LEDs are really marvellous things in that respect.
I read on FB a quote from Einstein when he said The really important discoveries in science don't begin with "Eureka!" but with "that's funny".
LEDs being a case in point - the guy who discovered the LED effect had no idea what use it would be, but saw it as a solution looking for a problem to solve. And look where it's got to now!!
LED lights
So far I've only seen warm white LED globes, which probably won't give you high colour accuracy, as I suspect the cool white colour temp is the more accurate for midday sun colour. I read (in IEEE Spectrum iirc) that our use of cool white in offices all day leads to disrupted circadian rhythms as the mind is attuned to a more yellow colour morning and evening with the bright bluer colour associated with midday sun, hence the body expects to wake up to warm white, peak activity with cool white, and wind down in the late afternoon with warm white again. The article went on to point out that technology is rapidly approaching the point where the colour temp of artificial light can be programmed to reflect the natural changes in colour throughout the day leading to a better balance in life. LEDs are really marvellous things in that respect.
I read on FB a quote from Einstein when he said The really important discoveries in science don't begin with "Eureka!" but with "that's funny".
LEDs being a case in point - the guy who discovered the LED effect had no idea what use it would be, but saw it as a solution looking for a problem to solve. And look where it's got to now!!
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