On Sunday, September 27, 2015 at 8:31:46 PM UTC-5, wrote:
Hi. I'm laying out my basement lighting. I expect to have 25 recessed lights, each is 75watt max rating (even though I will use LED, I know I must still assume max rating of fixture). 25x75=1875watts/120V = 15.6amps.
So, I cannot use one 15amp breaker and 14awg wire.
Can I wire all the lights with 12awg and a 20amp breaker?
All comments appreciated.

Thanks
Theodore

The breaker is there to protect the wiring. I you're really worried about overloading the circuit, you can feed the switch with #12 then split the lights into two strings wired with #14. One with 12 and the other 13 light fixtures with the circuits joined to the hot and neutral in the switch box. You'd need to use a deep switch box to make sure there's enough room for the wiring. ^_^

[8~{} Uncle Smart Monster