LED replacement for 48" fluorescents

True. Work great on 'large' areas to get down close to final. But they're too flexible to really get a super flat, blend in look. Noticeable if the light catches it. Or worse, those twice a year times when the sun glances down the side of the wall! GACK! I just push furniture up next to the wall then.

Through the door, was that a Butler's Pantry or was that part of the Kitchen?

What's the altitude out there?

Butler's Pantry... where the added wine glass rack is...

summer. ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| San Tan Valley, AZ 85142   Skype: Contacts Only  |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 
              
I love to cook with wine.     Sometimes I even put it in the food.

So, This is the color of the CFL light on the ceiling versus daylight trough the white curtains:

This is the LED strip behind the curtains set to approximately the same color as the ceiling light, and dark outside::

The Samsung is very very bright really. This is my TV viewing setting.

This the same situation with the LED strip set to about daylight color, not even maximum:

There is a color bar now on teh Samsung, but the Canon camera is blinded by it.

As you can see this is 1 (one) meter only in the window of 12V 5050 LEDs. It makes things outside a bit more light....

I used an 8" wide trowel on the joints, so they were slightly concave after the first coat. A careful second coat left it flat, and only a few light ridges to remove. The last time I saw anyone sand a joint was in the '60s.

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Anyone wanting to run for any political office in the US should have to 
have a DD214, and a honorable discharge.

I usually do the joint in stages... narrow trowel, then a wider layer, then the 8". Rarely, if any, joint sanding needed. ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| San Tan Valley, AZ 85142   Skype: Contacts Only  |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 
              
I love to cook with wine.     Sometimes I even put it in the food.

The sanding "screens" work very well. You need to put them on a "holder" designed for them, though. I have one that can either be hand held, or mounted to a pole, that has a vacuum attachment to remove the dust through the screen. It works *very* well.

That's the kind I have. ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| San Tan Valley, AZ 85142   Skype: Contacts Only  |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 
              
I love to cook with wine.     Sometimes I even put it in the food.

Well, since I was making these things custom, I wanted to get the efficiency as high as possible. So, it is a single series string, and the only series resistor is a fraction of an Ohm current sense resistor. (I don't know the exact value of the one in the commercial lighting regulator.)

Jon

Most people just slap it on, the sand off a lot of wasted compound. I haven't seen a decent mud job since I moved to the south. Every drywall crew I've ever seen on a job site already reeked of cheap beer when they arrived to do their work. I knew real professionals in Ohio who could do anything from Drywall to blue board & topcoat without sanding anything. You never saw a seam or wave in their work.

--
Anyone wanting to run for any political office in the US should have to 
have a DD214, and a honorable discharge.

Did NOT know such a widget existed, will look for it!

Lowe's has them. ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| San Tan Valley, AZ 85142   Skype: Contacts Only  |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 
              
I love to cook with wine.     Sometimes I even put it in the food.

Oh, good, then I don't feel so bad spending $62 for the gadget I put together. 20 1 W LEDs and a commercial power supply.

Jon

WUT?

Interpreted as a temperature relative to the color temperature scale, this is intermediate. Colder than the surface of the Sun, hotter than incandescent bulbs.

As a psychological perception, it is not a "cool" color temperature either; the harsh blues start start above 5000K.

Nah ... gotta agree with the poster on this one ... 4000K is just too blue. 3000k seems about ideal - a very neutral clean bright white that won't give you a headache - and doesn't look sickly yellow like the

For /840 and /940 series fluorescent lamp phosphors I would agree, but not for LEDs.

I even wonder how they are able to define a colour temperature for the bluish LED variants. These have a very strong blue spectral line and weak broad continuous red/green spectrum caused by the fluorescent material.

The 2700-3000 K LEDs have a relatively good balance between the blue spectral line and the rest of the spectrum and suitable for indoor lighting.

Actually, for indoor lighting, especially for a home, that's on the cold side ("pretty cold").

2700-3000K, like a typical incandescent bulb (normal to halogen), is considered 'warm'.

Some people don't mind 4000-5000K ("cool white" to "daylight") color temperatures, but I don't find them flattering to food or people (two of my favorite things), and they kind of bring back bad travel memories of crappy flickering flourescents starkly illuminating European stairwells.

It may have more to do with the color rendering index than the color temperature per se- the commercial metal halide bulbs (~4500K?) don't look as objectionable to my eyes.

Best regards, Spehro Pefhany

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this is

incandescent

either; the

4000K CCT seems to be where most standard lamps are. They can be had in a wide range of color temperatures. See:

?-)

I agree that 3000 K is best for home use. (In the lab, 4000 K may be preferred.) More importantly, SWMBO much prefers 3000 K to 4000 K.

I just put under-cabinet task lighting in the kitchen, as an XMAS present to her.

She loves it, talks about how much of an unexpected improvement this has brought.

Joe Gwinn

PS: For the record, I used the Philips EW Profile Powercore system. The luminaires I used are model 523-000027-73 (21", 3000K, 120vac, white), and the dimmer is a Lutron model DVELV-300P. Ordinary dimmers will not work. One must use a reverse-phase ELV dimmer.

We had a contractor's special 2x34W fixture in our kitchen with 3500K lights. It was way too dark so I installed 6500K tubes in it. It made a *big* difference. Recently, I changed the fixture to a 4x34W fixture and put 6500K tubes in it. It almost makes the kitchen usable. I'll eventually put can lights and pendants over the counters and rip out the fluorescent completely. I'll do under-cabinet if I can figure out a way to do it so no wires show.

I'll also use the 6500K tubes in the basement work areas. Lots of them. The rest of the house is normal incandescent.