... , great for schools and workshopSuper energy-saving: 45% to 65% energy-saving than normal T8 fluorescent tube, 25 ... than normal T5 with same lumen outputRapid payback in 6 to 8 months, much lower than LEDs (LED ... need 3 years to 5 years to get payback)CE/ROHS/EMC, great color ... 2 years warranty, reduces maintenance by 66% due to 20,000 hours extended lifespanStandard 2ft, 3ft, 4ft, ...