Technical information

487www.fagerhult.com • www.fagerhult.co.uk
HF-ballast
Fagerhults policy
When designing luminaires we make sure that the temperature of
the HF ballast does not become too high, as this can shorten the life
span. When a luminaire is installed and used correctly the life span
for the HF-ballast is at least 50,000 hours with a maximum 10 %
fault frequency. This applies at an ambient temperature of 25 °C (ta)
unless otherwise stated for the product.
We also employ our own policy where we set more stringent
requirements, over and above the tc-temperatures stated by the HF-
ballast manufacturers. We have voluntarily chosen to add a general
safety margin of 5° during testing. This margin may be seen to be
small, however, it results in an expected longer theoretical life span
for our products compared with using the data provided by the HF
manufacturers.
The choice of the right HF-ballasts for respective products is also
important. Unfortunately at the present time there is no HF-ballast
on the market which, in all technical respects, is best. Some ballasts
have better EMC-properties than others, some are cooler and some
have lower leakage current. There is also a great deal of dierence
in size between dierent HF ballasts. We consider these parameters
and then select the ballast that is best suited to the luminaire in
question.
Fagerhult only uses high quality HF-ballasts from leading manu-
facturers in its luminaires.
Product Output Temperature margin
Luminaires for fluorescent lamps
Loop Light 3x35 W > 20 °C
Zora 2x54 W > 25 °C
Ten° Line 3x28 W > 15 °C
Closs 2x35 W > 15 °C
Excis 4x54 W > 5 °C
Recessed fluorescent lamp luminaires
MultiFive 2x49 W > 10 °C
Indigo Clivus 2x54 W > 5 °C
Indigo Combo 2x28 W > 20 °C
Pozzo 1x60 W > 15 °C
Industry luminaires
Inducon (ta35) 2x49 W > 15 °C
Densus 2x49 W > 5 °C
Scatola 2x54 W > 15 °C
AllFive 2x35 W > 15 °C
Downlights
Pleiad Comfort G2 1x32 W > 10 °C
Pleiad Compact surface 1x26 W > 20 °C
Pleiad Compact G2 2x26 W > 15 °C
Decorative luminaires
Discovery 1x26 W > 10 °C
Discovery Space 2x18 W > 15 °C
Temperature example
Examples of temperature margins for a number of typical lumi-
naires are presented below. The stated margins concern luminaires
with standard HF. The margin relates to the maximum tc-tem-
perature stated by the manufacturer to give a life span of at least
50,000 hours with a maximum failure rate of 10 %. Please contact
our customer service department if you require data for other
products.
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