TECHNICAL INFORMATION

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Type of Signs

Section

 

 

 

The T5 System

 

Technical documentation

 

1.        The luminous output stated up until now is the catalogue from the T5 fluorescent lamps will be reduced by 10-14%.  This luminous output does not represent the light source’s maximum value and will therefore be called the design lumen.

2.        The degree of efficiency for luminaires will increase with an equivalent figure, 10-14% (in practice between 0-14% depending on the ballast used at the time of measuring and depending on whether the luminaire manufacturer had previously reduced his luminaires degree of efficiency).

3.        The luminous efficacy of the T5 fluorescent lamp will not be documented in another way as this was based on the fluorescent lamp’s maximum luminous output.

4.        The new design lumen and design efficiency - values will be introduces into our lighting calculation Easyplan to coincide with introduction of this catalogue.

 

Technical data for the different T5 fluorescent lamps

(Light source manufacturers have furnished company specific data)

 

T5 lamp

Ilcos-designation  and output

Length

Design Lumen

(Light source’s luminous flux emitted at an ambient temperature of 250C)

Luminous Efficacy

(Light source’s maximum luminous efficacy reached at an ambient of 350C

Max. Luminous Output

(Light source’s luminous output emitted at an ambient temp. of 350C)

14W

21W

28W

35W

24W

39W

54W

49W

80W

549 mm

849 mm

1.149 mm

1449 mm

549 mm

849 mm

1.149 mm

1449 mm

1449 mm

1200 lm

1900 lm

2600 lm

3300 lm

1750 lm

3100 lm

4450 lm

4300 lm

6150 lm

96 lm/W

100 lm/W

104 lm/W

104 lm/W

83 lm/W

90 lm/W

93 lm/W

100 lm/W

88 lm/W

1350 lm

2100 lm

2900 lm

3650 lm

2000 lm

3500 lm

5000 lm

4900 lm

7000 lm

For information documented below is a comparison between the T5 fluorescent lamp’s maximum luminous output at 35°C (will not normally be documented in the future) and the luminous output that applies at 25°C under the condition that the fluorescent lamp is powered with a reference ballast.

 

 

Relative luminous output

The adjacent diagram shows an Example of how the luminous output increases for t5 fluorescent lamp of 28w from an ambient temperature of 25°c (design lumen) to 35°c, where the t5 fluorescent lamp emits its maximum luminous output with a reference ballast.

 

New technology for reflector louvres

 

T5 fluorescent lamp in itself only

emits around 4% more light or 7%

if you consider the reduced control gear losses.  However, on the other hand it creates – depending on the type of luminaire – the conditions to increase the optical efficiency.  Efficiency increases the most for luminaires with good shielding against glare.  Through a new louver design – optimal control of light reflection is obtained.

  The new reflectors are used in  SLC luminaires to maximize efficiency and improved shielding against glare.  It has been possible to increase the optical efficiency by approx 35% when the luminaire is optimized with regard and reflector form.

 

 

Improved light treatment

  

 

 

The diagram shows the comparison between a traditional T8 luminaire with reflector louvre and an optimized T5 luminaire with reflector louvre.

Energy savings with optimised T5 luminaire

  The diagram show how the different factors in the luminaire design can affect the luminaire’s electrical efficiency in percent.

 

 

Year - 2002/2003