It’s amazingly nontechnical, it’s literally just lights taped to a truck. According to Marshall “It’s not very scientific, it’s a hideous site in the daylight, there’s black tape and wires in the daytime.” But at night it’s amazing. Marshall has used eight trucks and added dozens of strand since, though it’s always a 2WD Chevy/GMC with a regular cab and eight-foot truck bed “the way a truck ought to look.”
By his own estimate there are 50-to-70 strings with a mixture of 50 and 100 lights each, making a conservative estimate of 3,000 lights. There are no LEDs, just the cheap $0.89 strings, though he’d like to add some to take pressure off the taxed generator.
Source: jalopnik
