LEDs are around 3-4x more efficient than fluorescent lamps, (1) 28W 2x4 LED fixture puts out around the same amount of light as (1) 4-lamp 2x4 fixture with (4)

LEDs are around 3-4x more efficient than fluorescent lamps, (1) 28W 2x4 LED fixture puts out around the same amount of light as (1) 4-lamp 2x4 fixture with (4) 28W fluorescent lamps, depending on the lumen output package on the LED fixture.