Adjustable Mounting Brackets: Fits aquarium tank from 12" to 16" in length with adjustable mounting brackets; Light body without docking brackets measures 10" L x 2.7" W with no limit to rim size

Built-in Timer Function: Three timing modes available at 3, 9, and 12 hours; light will automatically turn off and on at the time you set for convenient operation

Brightness Adjustable Settings: 10 levels of brightness in total from 100% to 10% according to your preference for customized lighting control

Three LED Light Groups: Group 1 activates all lights (4 rows of white, blue, red, green LEDs) for day light effect; Group 2 turns on 2 rows of white lights; Group 3 activates only the middle 2 rows of white, blue, red, green LEDs for night mode effect

Energy Efficient LED Configuration: Super bright 5730 LEDs with total 36 LEDs including 24 pcs 6500K white, 6 pcs blue, 3 pcs red, and 3 pcs green, suitable for all freshwater and low to medium light plants; NOTE: LIGHT IS NOT WATERPROOF, KEEP THE LIGHT AWAY FROM SPLASHING WATER

Full Spectrum Lighting: Provides 2160 lumen output with a combination of 6500K white, actinic blue, pink, and green LEDs to support healthy aquatic plant growth and enhance fish colors