a reading light that is NOT a blueish-white LED

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Analog

Analog

Lifer
Jan 7, 2002
12,755
3
0
If you're handy with a soldering iron, you could replace the LED with an incandescent lamp of similar voltage. The problem is, it may burn out and it would be a hassle to replace. LEDs tend to last a long time and are vibration resistant.
 
HardcoreRobot

HardcoreRobot

Lifer
Nov 7, 2000
16,403
3
81
hot new tech coming out called a 'candle' you should google it

btw, they use LEDs bc they run cool, last forever, and consume little battery power. if you time travel back to the 80s you can probably find some that use incandescents, but you better start shopping for alternator sized AA battery packs.
 
I

Itchrelief

Golden Member
Dec 20, 2005
1,398
0
71
You're looking for a neutral white, warm white, or high CRI LED. The LEDs exist that may fit your needs, but I do not know if the manufacturers of reading lights have decided it is worth the cost and trouble to change their models to use them.

edit: high CRI is not necessarily a warmer tint, but due to the state of the technology at the moment, making an LED with higher CRI also tends to make it warmer looking.

If the manufacturer provides the data, look for color temp below 5000K. Your typical warm white CCFL is 2700K.
 
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D

Dessert Tears

Golden Member
Feb 27, 2005
1,100
0
76
Itchrelief said:
You're looking for a neutral white, warm white, or high CRI LED. The LEDs exist that may fit your needs, but I do not know if the manufacturers of reading lights have decided it is worth the cost and trouble to change their models to use them.
Click to expand...
I built a Luxeon III, 4xAA task light from a kit several years ago. I used a V1 color, which is a little yellow-green compared to the other bins. Unfortunately, it's only around-the-house portable.
 
Fritzo

Fritzo

Lifer
Jan 3, 2001
41,916
2,156
126
I think they invented them 100's of years ago:

candle-flame-and-reflection.jpg
 
Jeff7

Jeff7

Lifer
Jan 4, 2001
41,596
19
81
Itchrelief said:
You're looking for a neutral white, warm white, or high CRI LED. The LEDs exist that may fit your needs, but I do not know if the manufacturers of reading lights have decided it is worth the cost and trouble to change their models to use them.

edit: high CRI is not necessarily a warmer tint, but due to the state of the technology at the moment, making an LED with higher CRI also tends to make it warmer looking.

If the manufacturer provides the data, look for color temp below 5000K. Your typical warm white CCFL is 2700K.
Click to expand...
High-CRI can be had in a range of color temperatures.
...and I see you referenced that with the edit. :)


LED manufacturers like to use cool blue because they can get more brightness that way. White LEDs consist of a blue emitter and a phosphor coating that converts some of the blue into wavelengths in the yellow region. Your eye perceives that light as white.
If they let more of the blue through, you can can get a higher lumen rating, and bigger numbers sell more LEDs, even if the light looks like someone's electrocuting a Smurf.


You could always do a retrofit too, with the proper constant-current drive circuitry. :)
Lighting-grade Rebel LEDs.
(You probably won't want 350mA for a booklight though. ;))

On a related note, if you pulse a very short burst of about 2.5A through a Rebel LED, it's really goddamn bright. :eek:
 
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0roo0roo

0roo0roo

No Lifer
Sep 21, 2002
64,795
84
91
they use the awful color led cuz its cheap

you can buy color graded led, higher output, more efficient as well, folks at candlepower forum do this all the time with flashlights.
 
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