Patent ID: 7473024

Claim:
A light string, comprising: (a) plural standard lights, each standard light being in electrical series with each other standard light of said plural standard lights, said each standard light including a standard bulb having a pair of Dumet wires, a standard base receiving said standard bulb, said standard base having an exterior and said exterior having a length, and a standard socket receiving said standard base, said standard socket having an interior and said interior having a length, said standard light being operative when said standard bulb is received by said standard base and said standard base is received by said standard socket; and (b) a non-standard light in series with said plural standard lights, said non-standard light including a non-standard bulb having a pair of Dumet wires, a non-standard base receiving said non-standard bulb, said non-standard base having an exterior and said exterior having a length, and a non-standard socket receiving said non-standard base, said non-standard socket having an interior and carrying two electrical terminals, and said interior having a length, said non-standard light being operative when said non-standard bulb is received in said non-standard base and said non-standard base is received in said non-standard socket, wherein said length of said exterior of said standard base is shorter than said length of said interior of said non-standard socket so that, when said standard base is inserted into said non-standard socket, said Dumet wires of said standard bulb do not come into contact with said two electrical terminals of said non-standard socket and said standard bulb is not operative, and wherein said exterior of said non-standard base and said interior of said non-standard socket are keyed so that said non-standard socket is adapted to receive and orient said non-standard base.