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 Post subject: CFL vs. LED Light Bulbs
PostPosted: Sat Mar 25, 2017 9:32 pm 

Joined: Mon May 04, 2009 3:53 pm
Posts: 92
My eyeglasses are very expensive because the prescription is complex. The lense includes
a prism. Many years ago eyeglasses with prisms looked and felt horrible because the lense
was thick and heavy. Modern (and costly) plastic lenses are remarkably thin and the prism
is not visible.

In my house I've always used Bright White CFLs. With plenty of bright lighting I can do most
everything without eyeglasses. As you all know, CFLs are rapidly vanishing from brick and
mortar home centers. They're almost gone from the web too. I must transition to LED bulbs.

Obviously, I want to buy Bright White LED bulbs. Several manufacturers are selling "Natural
Bright White" LED bulbs. Here is a good deal on eBay for 10 Natural Bright White LED bulbs.
9w = 75w equivalent.

http://www.ebay.com/itm/10X-LED-Light-B ... SwInxXMCpB

Before I start buying, is a Natural Bright White LED bulb similar to a Bright White CFL?

Unlike most people who insist on soft white bulbs, I really need those extra "bright white"
bulbs. My home is the only place on earth where I can walk safely without eyeglasses. That's
why I must buy LED bulbs similar to Bright White CFLs.


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 Post subject: Re: CFL vs. LED Light Bulbs
PostPosted: Sun Mar 26, 2017 4:41 am 

Joined: Wed Dec 26, 2007 5:16 pm
Posts: 306
Location: N. Florida
Depends on the light appearance number. If they are the same then the color should be similar. The ones on Ebay you mentioned are listed as 4000-4500K which is commonly called "natural white", 5000K are usually listed as "bright white".

Steve G


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 Post subject: Re: CFL vs. LED Light Bulbs
PostPosted: Sun Mar 26, 2017 7:07 pm 

Joined: Mon May 04, 2009 3:53 pm
Posts: 92
Yes, you're correct sghioto.

Because Soft White CFLs were manufactured in huge quantities they were cheap. Bright White
CFLs were always more expensive.

That low eBay price for 10 "Natural Bright White" LED bulbs was too good to be true. If I want
Bright White LED bulbs they are going to cost more.

I realize CFLs are being discontinued because they contain mercury. I should have purchased
a truck load of Bright White CFLs a couple of years ago!


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 Post subject: Re: CFL vs. LED Light Bulbs
PostPosted: Mon Mar 27, 2017 1:20 pm 
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Joined: Thu Aug 01, 2002 12:01 am
Posts: 2733
Location: San Jose CA
yes, you probably want 4000k or 5000k bulbs but even those are not all equal. If the prism in the eyeglass makes you sensitive to uneven spectral lighting, you might need to do some experimenting, I doubt you can get what you want based on spec alone. Some of these bulbs mix several LED of different light colors and others are more pure. Since the light is made in a semiconductor, it tends to be less broad spectrum as incandescent.

What you probably want to look for is a bulb with high CRI (Color Rendering Index) I think you might like the Cree bulbs over the Walmart or Home depot 10 pack cheaper bulbs. Some brands do publish the spectrum on their websites and more rarely on the packaging. http://creebulb.com/ , http://creebulb.com/media/document/file ... t_0716.pdf

While CFL are going out of style, you can still get other types of fluorescent fixtures.


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 Post subject: Re: CFL vs. LED Light Bulbs
PostPosted: Wed May 17, 2017 5:05 pm 

Joined: Fri May 10, 2013 12:55 pm
Posts: 9
super duper bright leds sells LEDs by color. Natural white is easier on your eyes and its white enough. Warm white emulates Edison bulbs. Cool white is what you are thinking. its a little on the blue side. That looks the brightest, but its also a little bit uncomfortable for some people.

In the bathroom, I use cool white so I can see all the details. In the living room I use Natural White. In the bedroom, I use the warm light because blue and white light wakes you up. In my car's dome cabin light, I use red LEDs because I'm weird and creepy.


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 Post subject: Re: CFL vs. LED Light Bulbs
PostPosted: Thu May 18, 2017 11:12 am 
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Joined: Thu Oct 26, 2006 7:11 pm
Posts: 1197
Location: Maryland
The color of light from lamps, incandescent, cfl, led all should have a CRI number. (Color Rendering Index). This can be critical if color matching is important.
Here's Wikipedia's take on the matter if you want all the details https://en.wikipedia.org/wiki/Color_rendering_index
And specifically, towards LED's is http://www.eaglelight.com/category/lighting_tutorials.color_rendering_index/

I hope this sheds some 'light' on the matter!



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“To invent, you need a good imagination and a big pile of junk.” (T. Edison)
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