Question:
What is the difference between the types FH and FQ for the T 5 (16 mm) fluorescent lamps?
Answer:
FH stands for Fluorescent High Efficiency. These lamps offer extremely high luminous efficacies up to 104 lm/W. FQ stands for Fluorescent QUINTRON. Linear T 5 (16 mm) fluorescent lamps have four lamp lengths and are 5 cm shorter than the lengths of the T 8 (26 mm) lamps as a basis (55, 85, 115 and 145 cm), i.e. a FH lamp and a FQ lamp have the same length with different wattages (e.g. same length of 115 cm for FH 28W and FQ 54W).
FH (14 to 35 W) lamps are lamps with a very high luminous efficacy with values up to 104 lm/W, FQ lamps (24 to 80 W) are lamps with an increased lamp wattage and higher luminous flux values per lamp for direct and indirect lighting, high rooms and for industrial lighting. FH can be used for offices and good architectural design with a high energy efficiency. FQ lamps are therefore used where a high luminous flux value per lamp unit is required, as the luminous efficacy of the FQ lamps is around 90 lm/W.
The use of the respective design FH or FQ is dependent on the type of system and on the luminaire type.
FQs are particularly well-suited for direct/indirect lighting, high rooms and for industrial lighting. FH can be used for offices and good architectural design with a high energy efficiency.