Jandorf
4", 1/4 ip, flat crossbar kit, with includes 3/8 ip x 1/4 ip hickey & 1/4 ip x 1/8 ip reducer & 2 each 8-32 x 1/2" mounting screws, use to mount light fixtures to the electrical junction box.
GE Color Select LED 25 Watt Replacement, T8 LED Tube Bulbs (2 Pack)
GE Color Select LED 30 Watt Replacement, T8 LED Tube Bulb (1 Pack)
Cooper Lighting Halo HLBSL609FS5 Round 6" Slim c-Canless LED Downlights
Leviton 004-3152-8 Porcelain Keyless Screw Terminal Lampholder ~ 660w
Leviton 003-124-D Pigtail Type Incandescent Lampholder