Each box contains 2 post caps (5.5 in. x 5.5 in.) and 2 adaptors (3.5 in. x 3.5 in.)
Actual size of this solar post cap light is 5.5 in. x 5.5 in.,, which fits 5.5 in. x 5.5 in. vinyl fence post and 6 in. x 6 in. wood post, with the adaptor included, it fits 3.5 in. x 3.5 in. vinyl fence post and 4 in. x 4 in. wood post
1pc super bright warm white LED 10lum, which is more than 8 x standard LED (1.2 Lumens), up to 8 hours use on a full charge
1pc rechargeable lithium IFR14500 battery included, mounting hardware included
Durable plastic construction in white weatherproof finish
Lights up automatically every night auto off switch