600 MM T8 Marine Tubelight
This is a fine general purpose marine tubelight. It has undergone more than a dozen tests including vibration, accelerated aging and heat tolerance. The light is designed to generate a uniform glow. With a light decay of less than 1% per year, it has an effective working life of more than 50,000 hours. At 10 hours of use a day, this would translate to 13 years plus.