The LH0166 tombstone lamp holder is a nonshunted, plunger (male) end, push fit or screw down HO lamp holder. The LH0166 fits RDC R17d lamp bases and has ratings of 660w - 600v for HO fluorescent and LED lamps. It is made of thermoplastic and is cULus certified.
Link to HO, T10 1500mA, T12 VHO,lamps that fit this socket