Lamp Technology T5 Fluorescent Lamps

Significant advances in fluorescent lamp technology have occurred in recent years. Lamps are becoming smaller and more efficient, with better colour rendering properties and longer lamp life. More new installations are being specified incorporating the latest technology in fluorescent lamps – T5.

T5 refers to the diameter of the fluorescent tube, being 5/8 of an inch or 16mm. These lamps represent a major advancement in fluorescent lamp technology and offer many
Advantages over their predecessors, the T8 and T12 lamps.

Some of the major benefits of T5 lamp technology are described below.

Cost savings and environmental benefits through…

– Energy efficiency
T5 lamps are specially designed to operate on electronic control gear, which reduces operational losses and increases the overall efficiency of the lighting system.

– reduced maintenance
With a long average rated lamp life of 20,000 hours and high light output throughout their life, the intervals between lamp replacements for T5 lamps are longer than for T8 and T12
Lamps, resulting in reduced maintenance costs. Further, being shorter and slimmer than T8 or T12 lamps, there cannot be any “mix-ups” with maintenance personnel installing the wrong type of lamp – a T8 or T12 lamp cannot be installed into a T5 luminaire.

– reduced material usage
In addition to the environmental advantages of high energy efficiency and longer life, T5
Lamps offer the advantage of reduced material usage. Shorter and slimmer than T8 and T12
Lamps, their compact size results in reduced use of glass, gases and phosphor. Fewer
Materials and smaller size also mean reductions in material costs, freight and so on.

Design flexibility and aesthetics
The compact size of T5 lamps also offers major advantages in terms of their application. Luminaires can be shallower and more aesthetically pleasing, with the lamps being particularly suited to areas with limited ceiling space and suspended systems. Further, the
Shorter luminaire length means that T5 luminaires can be installed in a continuous run within standard ceiling grids – not possible with T8 or T12 lamps due to the overhang of the luminaire at one end. The size of T5 lamps also offers major advantages in terms of their application.

Luminaires can be shallower and more aesthetically pleasing, with the lamps being particularly suited to areas with limited ceiling space and suspended systems. Further, the
Shorter luminaire length means that T5 luminaires can be installed in a continuous run within standard ceiling grids – not possible with T8 or T12 lamps due to the overhang of the luminaire at one end. Another benefit relates to the T5 lamp’s relatively high maximum luminous flux, achieved at an ambient temperature of 35 degrees Celsius. This means that the maximum light output of the lamp is achieved when the temperature within the luminaire is at 35 degrees Celsius. T8 and T12 lamps are designed to achieve their maximum light output at 25 degrees Celsius. Since actual temperatures around the lamp, particularly in closed recess luminaires, usually far exceed 25 degrees, T5 lamps work much more
Efficiently and reliably, with greater light output.

“T5 lamps represent a major advancement in fluorescent lamp technology.”
There are two different types of T5 lamps available, each suited to a different application – high efficiency and high output.

High efficiency
T5 lamps provide the same amount of light as a comparable T8 lamp, but with excellent efficiencies (in some cases using up to 20% less energy). A unique feature of these lamps is that the luminance of all lamp wattages is the same, making them ideal for cove lighting applications, as there is no perceived difference in illuminated surfaces.

High output
T5 lamps provide up to 50% more light than a T8 lamp of similar length, and are generally used for indirect lighting and in luminaires that are mounted on high ceilings. T5 lamps represent a major advancement in fluorescent lamp technology and are increasingly being installed in new and refurbished buildings. Together with properly designed and innovative luminaires, they generate highly economical, efficient and aesthetically pleasing lighting solutions.