wow...looks like overkill

How many switches for 16 downlight? You need minimal 4 switch, best will be 8. But why so many?

Better use T5, much brighter and better distribution of light. You can configure 2 switch for the T5 inside the L box. One for Even, another for Odd. So switch both you get all your T5 switch on.

You need to work some magic. If you don't mind, there is also AliExpress

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Added on March 20, 2012, 10:35 am

They do, you just need to post the right question.

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Added on March 20, 2012, 10:41 am

1) The spacing of the wiring from the side wall is too near. At least 3' away from the side wall.
2) If you ceiling height is no more than 15', 4" (more units) or 6" should be fine. If you want, and I presume you have plaster ceiling, just get them to lower it to 13' which will make a whole lot of difference. But if you want to feel of spaciousness then you will have to have a higher ceiling. Just remember, when it is time to change a fuse bulb, it will be a real hassle.
3) Your wire man is making a killing here as he is going to charge you for each light point.
4) Besides that, when he install the downlight, he will probably charge  you another fee. The more downlight the more $$$.
5) You also need to spend more to purchase downlight and bulb

Hi, I would like to seek opinions from the experts here...
My ceiling height is only 100" and planning to use 4" downlight without glass..
what is the suggestive distance of each downlight?
I prefer bright environment