How tall must the letters be to indicate the maximum allowable wattage on incandescent lamp luminaires?

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The requirement for the height of letters indicating the maximum allowable wattage on incandescent lamp luminaires is that they must be at least ¼ inch tall. This specific size ensures that the lettering is clearly visible and legible for safety and compliance reasons, allowing users to easily determine the wattage limit to avoid overheating and potential fire hazards. Utilizing a minimum of ¼ inch height strikes a balance between visibility and practicality, accommodating typical viewing distances in various settings. This standard is crucial for maintaining safety in environments where incandescent lamp usage is common.

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