{TAIL ~ a housing} comprising {HEAD ~ a concave inner surface} and a convex outer surface, the concaved inner surface defining an aperture with a perimeter having a plurality of sides that forms a cavity, the housing for receiving one or more lamps within the cavity, 
{ TAIL ~ a housing } comprising { HEAD ~ a concave inner surface } and a convex outer surface , the concaved inner surface defining an aperture with a perimeter having a plurality of sides that forms a cavity , the housing for receiving one or more lamps within the cavity ,
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