Rough service lamp

means a lamp that:

(1) has a minimum of 5 supports with filament configurations that are C‐7A, C‐11, C‐17, and C‐22 as listed in Figure 6‐12 of the 9th edition of the IES Lighting Handbook, or similar configurations where lead wires are not counted as supports; and

(2) is designated and marketed specifically for ʹrough serviceʹ applications, with:

(A) the designation appearing on the lamp packaging; and

(B) marketing materials that identify the lamp as being for rough service.