B-right Pack of 5 Units 12W 6-inch Dimmable Square LED Panel Lights Ultra-thin 960lm 5000K Cool White LED Recessed Ceiling Lights for Home Office Commercial Lighting What You Care: 6" cut hole size, ultra-thin approximately 1" thickness; Very little heat generated; No recessed can needed; Junction box not included, transformer size about 1 1/2 inches x 3 1/2 inches. One light come with one transformer. Energy Efficiency: 960 lumens, 90 watt halogen replacement uses only 12 watt. Base on 5 hrs/day, estimate yearly energy cost $2.4, and it will lasts about 16.5 years. Dimmable LED Panel Light: AC110V dimmable panel lights, compatible with silicone-controlled rectifier type dimmer. No fliker and no dazzling, CE & ROSH & FCC Approved How to Install: Turn off the power-Cut a appropriate hole on sheetrock-Connect the driver to the 110V power supply-Pull up the sprinng clips and put the panel hook on the hole-Adjust the panel to stick the ceiling tightly. Extension Cable Provided: 5FT, 10FT, 20FT Extension Cable to extend the distance between light fixture and led driver, if you want, you can search "B-right extension cables" on Amazon, buy now for your convenient installation.