1. Service life
T8 energy-saving fluorescent light design life is 16000h, because the shielding ring and three helical filament guarantee is adopted in T8 energy-saving fluorescent light filament part. Shielding ring design can greatly reduce lamp blackheads speed, to maintain high lumen maintenance; three helical filaments may carry more electronic powder, thereby improving the lamp efficiency and prolong the life. Energy saving led t8 tubes 3000 hours luminous maintenance rate is 92%. While the T5 cannot increase thin diameter shielding ring due to its own limit, and radiated by the intense 184-nm UV, causing larger light fades, thereby reducing the lamp life. Usually the life expectancy is only 8000h. Energy-saving T8 fluorescent lamps began production from the 1940s, which has mature production process guarantee. T5 fluorescent lamp production began from 1995.
Because the light emitting efficiency is relevant to the diameter of the lamp; if the diameter is too thick and too thin, the luminous efficiency will decrease, the luminous efficiency is maximum in particular diameter. According to the literature describes, the experimental results and theoretical calculations show that the best caliber (diameter) is about in the range of 20-24mm (T5 inner diameter is 14mm, T8 inner diameter is 24mm). The initial lumen of energy saving T8 fluorescent lamp is 3100lm and maintains up to 2 years or so at 3100lm lumen, but T5 fluorescent lamp is 2800lm.
3. Environmental protection
Energy-saving T8 fluorescent lamp ballast is better than T5, which consumes less energy at work. T8 energy-saving fluorescent lamp ballast energy consumption is only 2W, while T5 lamp and ballast energy consumption is around 6W. Recently, mercury used by most T5 lamps is more than energy-saving led t8 tube light, and even if T5 amount of mercury used in the future is down, phosphor and timber go down, the T5 rated life is about 8000h, which is still insufficient compared to 16000h energy saving T8 fluorescent, because the longer the life, the less replacement, the less original waste. T8 win a chip from the combined effect.
4. Eye protection
T5 lamp unit luminous intensity is strong, glare and irritant to eyes. Energy-saving T8 fluorescent light is soft, glare-free, green and eye protection.
Under the same lamp length, the finer the lamp, the higher the starting voltage is. T5 lamp is difficult to start due to small diameter, coupled with the high-pressure lamp tube, so the temperature is high, accelerating the aging of matching lamps and the power lines, there are security risks.
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