Hello Steve, Given the standard Inside Diameter of 3/4" PVC conduit, you should indeed be able to fit two strands of 10/2 cable for running under your driveway.
Yes, it's pretty easy. Get a single pole switch and a box from HD. Cut one of the wires and hook the ends up on either side of the switch. I put a bright downlight over a BBQ grill in an outdoor cabana. When dinner was ready the customer could turn off the light.
Planning to light up a pavilion. It has redwood covered posts. Using up/down sconce but concerned wiring exposed. Any suggestions.
I used the Volt filters on my Infiniti G series to add a holiday flair to my house. It literally took 10 minutes. Highly recommended
Are VOLT Lights worth the money? Please, check our reviews and see what others say https://www.google.com/shopping/seller?q=voltlighting.com&hl=en_US
I'm an engineer. I do precision guesswork based on questionable data from unreliable sources. Motto; "If I can't fix it... it isn't broken".