PENTRON® T5 fluorescent lamps are available in two families, normal and high output. Smaller 5/8 in dia and approximately 2 in shorter in overall length than standard T8 lengths. Maximun light output achieved at 35 deg C rather than 25 deg C allowing for greater luminaire design flexibility and improved luminaire efficiency. Optimally paired with QUICKTRONIC® PROstart® electronic ballasts and covered by the comprehensive QUICK60+ or QUICK7XL System Warranty.