Type A+B 3 in 1: 

Ballast compatible, single-ended and double-ended direct AC 120-277V input

☞ High Efficiency & High Lumens: T5 4ft 24W 3200lm/3500lm/ 3600lm  

☞ Beautiful design: The same size as the traditional T5 and shortest end cap, both end caps of the symmetrical (Long just 55mm / 2.16inch only)

☞ Full spec available: 2ft 7W/12W, 3ft 12W/18W , 4ft 15W/24W , 5ft 18W/24W

☞ DLC 5.1 

A mode: compatible with 0-10V dimming ballast

B mode: 0-10V dimming system control