For most of our gigs we hire a sound and lighting company. They have far more (and better) gear than we ever will, and not having to set up/take down more stuff is awesome.

For smaller gigs, we have a fog machine, two Chauvet 4-Bar LEDs (Amazon Link) and a LED "Magic Ball" (Amazon Link). The 4-Bars are set up at the front of the stage at a 45, generally pointed at our singer. The "Magic Ball" sits in front of the kick drum. We also have a strobe that has an on/off footswitch controlled by the drummer, who also controls the fog machine (usually to excess, so we often threaten to take it away).

The 4-Bars are connected together and controlled by a footswitch that our singer controls. The "Magic Ball" is sound activated and generally follows the kick.

Throw in a large black curtain/sheet and our 3' x 10' band banner behind the drummer, and it's a (relatively) inexpensive setup that only uses a single 15-amp circuit.