LED Post Cap Light- Square Style, Classic White, WTSQLEDCAP4X4C Post cap lights featuring PVC housing, polycarbonate lenses with 12 Cree SMD LED's (3000K) Designed to fit Trex 4x4 composite post sleeves (4.55" x 4.55" Internal Dimensions) Compatible with Trex Light Hub installation system Requires Trex 12v DC transformer (sold separately) Available in Pyramid or Square designs