A few weeks ago, commercial photographer Jay P Morgan showed us how to balance strobe light with ambient light on a large 18 wheeler (which involved closing down a California highway on ramp). In this video Jay is shooting a lifestyle image for Pilot Freight Services which requires him to light a large outdoor areas with studio lighting. The answer to the question in the title could probably be "one light," but using one strobe on a commercial shoot is not only going to produce a less than perfect image, it is also going to look unprofessional from the eyes of the art director. When photographing large advertising campaigns, I've learned that giving your clients that "wow" experience is perhaps even more important that the actual final image so don't underestimate the saying under promise and over deliver. What is great about this photoshoot is that even if you don't shoot large campaigns like this on a daily basis, it should still force you to think why certain lights are needed, and more importantly, ask what you yourself would do if this was your hired job.