A lighting designer is programming dynamic lighting effects for a theatrical production. The designer wants to arrange 4 different colored lights in a sequence for a special scene. If two specific colors must always appear next to each other, how many different sequences can the lighting designer create?

Tue, 05 May 2026 18:23:40 +0000

**A lighting designer is programming dynamic lighting effects for a theatrical production. The designer wants to arrange 4 different colored lights in a sequence for a special scene. If two specific colors must always appear next to each other, how many different sequences can the lighting designer create?** In today’s evolving world of live performance and immersive theater, the precision of lighting design plays a transformative role. As storytelling becomes more visually dynamic, lighting designers are increasingly blending tradition with cutting-edge technology—programming sequences that shift tone, emotion, and focus in real time. Whether enhancing a dramatic climax or guiding audience attention subtly, the sequence of colored lights is far more than decoration; it’s a narrative tool. When working with four distinct colored lights, a key challenge arises: ensuring two specific colors remain adjacent. This seemingly simple constraint presents a thoughtful puzzle—one that resonates with technical precision and creative movement. For those involved in theatrical production, understanding how such design choices shape performance adds depth to the craft. **How many unique sequences can a lighting designer create under this constraint?**
To solve the arrangement, consider the two fixed colors as a single unit or “block.” This reduces the problem from four individual lights to three: the paired block and the two remaining individual lights. These three elements can be ordered in 3! (three factorial) ways—equivalling 6. But within the block itself, the two colors can alternate: color A followed by B, or B followed by A. That adds a factor of 2.