... ,and low heat 2.Certificate:UL 2.super quiet and long life 4.T5 watts:8w,13w,14w,21w,24w,28w ... of the sun at high noon, combined with full spectrum technology, our T5 fixtures emulate the sun without heat so you ... (°C)- 10°C-——40°CQualified StandardUL/FCCLife(h)>10000H 21w long lifespan t5 fluorescent lamp housing