Maximum Lamp Spacing (MS):

\[ MS = Ci \cdot MH \]

Where:

• \(MS\) is the maximum lamp spacing in feet (ft).
• \(Ci\) is the lamp coefficient (0.9 for RLM standard-dome frosted lamp and 1.0 for RLM standard silvered-bowl lamp).
• \(MH\) is the lamp height in feet (ft).