T5 retrofit conversion

T5 retrofit conversion is a means of converting light fittings designed to use T8 format lamps, so that they can use more energy-efficient T5 lamps.[1] This is done by electronically converting the luminaires to high frequency operation.[2]

Contents

Differences from other fluorescent lamps

See also: T5 fluorescent lamp

T5 lamps are approximately 40% smaller than T8 Lamps. T5 lamps have a miniature bi-pin base while T8 lamps use a medium bi-pin base.[3]

Conversion technology

Conversion kits are available which will work in existing fittings containing switch start, mains frequency fluorescent lamp ballasts. The kits convert the fittings to use energy efficient, high frequency ballasts and accommodate the smaller diameter T5 lamp.[1]

The magnetic ballast remains in place but it is bypassed, rendering it ineffective as a conductor. The new high-frequency ballast draws only 2W, rather than the 6-10W of the old ballast, increasing the efficiency of the system.[4]

There are two main types of conversion kits:

Lamp end type -- kits which include a replacement starter and two separate components to fit over each end of the T5 lamp. The lamp is then slotted into the existing fitting.

Baton type -- one piece kits which slot into the existing fitting and into which the T5 lamp is placed.[1]

Energy efficiency

T5 retrofit conversion can maintain existing lighting levels at up to 65% reduction in energy use.[2]

References

  1. ^ a b c The Carbon Trust, "How to implement T5 retrofit conversion kits", [1], accessed 11-30-2009.
  2. ^ a b Save It Easy, [2], accessed 11-30-2009.
  3. ^ Lighting Research Center, "T5 Fluorescent Systems", [3], accessed 11-30-2009.
  4. ^ Building Sustainable Design, "New generation energy efficient fluorescent tubes: triphosphor", [4], accessed 11-30-2009.

External links