In looking at the plan of the model home, I notice that they are using quite dark cabinets. I'm not sure if that is your plan as well, but, when you place the cans close to the cabinets you will have "bright" spots or scalloping on the face of the cabs. Not a bad idea if the cabs and lights line up symmetrically, but... that really never happens and it causes visual confusion-so not a good idea.
I am one of the lighting designers at Task Lighting Corp. We manufacture "Made In America" specialty LED lighting as well as the Angle Power Strip. Just as suggested above, we do have frosted lens over the diodes as well as a choice of 2700k (warm white) color temp and 3000k (neutral white) color temp. It depends on the "feel" of the room and the surface materials and colors. Greys, blues, whites, etc. will look best with the 3000k and warm tones, caramels, some reds, ivory, cream, etc. look best with a 2700k. So make sure when choosing light sources for your room that you keep the same (or very close) color temperature in all of them or you will get a "jarring" feeling when in the space.
Again, with undercabinet lighting, I noticed that on your electrical plan they have the lights placed right against the wall. I recommend placing them out from the wall and at the front of the cabinet, so the light is focused at the middle of your countertop where you actually do the work, but then spills both forward and backward to illuminate the entire countertop area.
Regarding placement of the cans, since you are planning on undercabinet lighting, you can place the cans farther out from the cabinets and get more of a general light with fill light that will help to illuminate the whole space as well as add to the total countertop lighting. Find out the BEAM SPREAD of the light source (light bulb, directional LED bulb) and then look at the diameter of the beam spread. Split that in half and add 3 inches. In the "old days" when we used Halogen bulbs, that distance was about 39" out from the wall with about 4'-5' between fixtures. Now, you need to look at the information provided with your bulb. If you have an upper cabinet that project 24" or more from the wall, like a cabinet over a refrigerator, oven, or a pantry cab, you would want to place that can farther out, or adjust your can layout so that a can isn't right next to the doors when they swing out.
I could go on and on but I hope this helps a little. Good luck on your new kitchen. I'm sure you will LOVE it!
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