On Thu, 07 Jun 2012 20:28:21 -0500, tom wrote:

On 6/6/2012 10:07 AM, Jeff Liebermann wrote:

By comparison, the 8 watt EcoSmart 40w bulb produces and insipid 430
lumens and a 3000K color temperature. Like all the blue+yellow=white
bulbs, they tend to favor the yellow. My eyes can be easily fooled,

Yes, they are horrid, but I'd say they favor blue. Regardless, they can
inhale vacuum.

Your eyes are suppose to more sensitive in the yellow area than blue.
Getting the ratio between the blue LED and the yellow phosphor right
is a major headache. Among my 4ea Ecosmart bulbs, I can't really see
much variation. However, my camera certainly sees differences. One
is rather blueish, while the others are varying shades of yellowish.
I'll try to take a phone of all 4 of them at the same time. That's a
problem right now because they're installed all over the house.

Also, another advantage of LED light bulbs is that they can be dropped
without breaking.

Argh... I can't find the spectra photo. These look like fun:
http://www.scientificsonline.com/diffraction-grating-glasses.html

I need that. Ordered 12, they're cheap. I'll give the extras to friends.

It's made for "raves" but works equally well for a fast spectrographic
analysis. There are other diffraction grating type spectrometers
available, but it's difficult to beat the price.


--
# Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060
# 831-336-2558
# http://802.11junk.com
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