Where I buy inexpensive and pious part niche lighting? ...

Appliances...?
Answers:    home depot has the most expensive fixtures because they with the sole purpose buy JUNO branded fixtures. As an architectural lighting designer i can promise you that the quality you buy at a material lighting showroom exceeds that of home depot and costs half. If you want 6" high-hats near trim for $25 call Plaza Lighting contained by NJ. 4" high-hats are $44. They have other been great on the phone beside me when I do tri-state area job. Call them up and they'll walk you through what types are available and how to lay them out properly.

http://www.Plaza-Lighting.com
Scale of a house?
home depot or lowes