2. Luminaire design
2.1. International Electrotechnical Commission
(IEC) Recommendations
The general recommendations for luminaire design by IEC are also
applicable to T5 luminaires. Lamp-related data can be found in IEC
Standards 61195 for safety and 60081 for performance.
2.2. Operating temperaturesT5VHO and HO
ExtremeTemperature lamps
2.2.1. Lamp temperatures
The data on the T5 lamps are based on free burning conditions in a
reference circuitry and the lamp should also be tested in that way,
unless stated otherwise.
2.2.2. Maximum temperatures of lamp parts
Luminaires forT5 lamps must satisfy the general requirements for
luminaires as specified by IEC 60598 and, if applicable, comply with
the requirements of local standards.The maximum allowed
temperature of the lamp cap is 248°F, as given in IEC 61195—
Double capped fluorescent lamps—Safety specifications.
2.2.3. Measuring the lamp cap for optimum lamp conditions
In comparison with cold spot mercury lamps, the relation between
light output and cap temperature is less direct with amalgam
lamps. Over a broad temperature range the light output is at a
very high level.
2.3. General recommendations for handling and
measuringT5 lamps and luminaires
2.3.1. Handling
Handling of T5VHO and HO Extreme Temperature lamps is less
critical than the handling ofT5 HE/HO lamps with cold-spot
technology. It is recommended to handle the lamps in a vertical
position with the stamp at the lowest side.
Allow the T5 ExtremeTemperatureVHO and HO lamps to cool
down for 10 minutes before handling.
4 OEM Design Guide PhilipsT5VHO and HO ExtremeTemperature Lamps and Ballasts
