Appliances & Equipment

Energy-efficient fluorescent tubes

Average efficacy (Lumens/Watt) of various light sources:

• Tungsten Lamp - 15 lm/W
• High Pressure Mercury Lamp - 40 to 60 lm/W
• Fluorescent Lamp - 64 to 100 lm/W
• Metal Halide - 70 to 90 lm/W
• High Pressure Sodium - 90 to 125 lm/W
• Low Pressure Sodium - 120 to 200 lm/W

Fluorescent lamps are basically low pressure mercury lamps

Lamp Labelling F = Fluorescent T = Tubular lamp shape 8 = lamp diameter in 1/8 inch increment e.g. T5 = 5/8 inch = 16 mm T8 = 8/8 inch = 1.0 inch = 26 mm T10 = 10/8 inch = 1.25 inch T12 = 12/8 inch = 1.5 inch = 38 mm

Fluorescent lamps, T12, T10 & T8, have long been used as energy-efficient lamps for general lighting New generation of T5 fluorescent lamps with 16mm dia. & G5 base has recently been developed for improved efficient (100 lm/W) & performance

Typical lamp wattage of T5 lamps is tabulated below as compared with their T12 & T8 counterparts

• Major Benefits of T5 Fluorescent Lamps:
  
  
  • Saving in power & energy consumption through improved efficacy (e.g. 28W T5 = 36W T8 = 40W T12 )
  • Environmentally friendly - use less glass, less mercury & package material
  • Enables use of slimmer, neater luminaires to suit metric grid ceiling
  • Longer lamp life - over 15000 hours with electronic ballast
  • Reduce storage space & transportation costs

T5 lamp is optimized for temperature conditions as expected within a luminaire (i.e. 35C)