Tips: 1. According to the max load capacity of the dimmer to install appropriate quantity in one dimmer switch. 2. Recommended to increase the number of 10-20% of product to meet the product illumination, if the installation height over 8ft. 3.Base on 107sq.ft area, 8ft install height: (1).Home (about 90-150lux): 3W:6-7pcs;6W: 5pcs; 9W: 3~4pcs; 12W: 2~3pcs; 15W: 2pcs; 18W: 1~2pcs ; 24W: 1~2pcs (2).Office or Commercial: (about 180-240lux) :3W13pcs; 6W: 9pcs; 9W: 6pcs; 12W: 5pcs; 15W: 4pcs; 18W: 3pcs; 24W: 2pcs FEATURES: 1. Upgraded Material: Die-cast aviation aluminum, great heat dissipation; Intelligent constant current driver, good surge protection, fireproof, safe and durable. 2. Uniform Soft Light Effects: Sideways emit light, through the light diffuser and guiding plate create uniform and soft light effect, that is pleasant on the eyes with flicker-free. 3. Convenient Install: Assembled the spring clips, remove your troubles to install the clips than other brands. What's more, each panel lamp we added 2 Wiring Caps to easily wire them to 110v power cable. SPECIFICATION: 1. Wattage: 18W 2. Dimension: 225*10mm, Cut size: 195-205mm 3. Material: Aluminum+Acrylic 4. Input Voltage: AC 110V/50-60 Hz 5. Luminous Flux: 1600lm 6. Luminous Effiency: >70 lm/W 7. LED Light Source: SMD2835 8. LED Quantity: 90 pcs 9. Ip Rating: IP22 10. CRI: Ra>80 11. Beam Angle: 150 degree 12. Color Temp: 6500K HOW TO INSTALL: Turn off the home power→Cut a appropriate hole on sheetrock→Connect the transformer 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.