Amalgam technology

T5 fluorescent lamps HO CONSTANT, as well as compact fluorescent lamps OSRAM DULUX L CONSTANT and OSRAM DULUX T/E CONSTANT, show, thanks to amalgam technology, constant high luminous flux over a wide temperature range.

More efficient and energy-saving lighting for T5 and compact fluorescent lamps.

Compare:

• Conventional T5 lamps:
  > 90 % luminous flux between approx. 25 °C and 50 °C (max. luminous flux at 35 °C)
  
  
• CONSTANT lamps:        
  > 90 % luminous flux between 5 °C and 70 °C
  (except LUMILUX T5 HO 49 W CONSTANT: 20 °C and 80 °C)

Your benefits

• Flicker-free pre-heat start
• More light than from conventional HO lamps
• Higher system efficiency over a wide temperature range

High luminous flux over a wide temperature range

Start-up of a CONSTANT lamp

With T5 HO CONSTANT amalgam lamps (24 W, 39 W, 49 W, 54 W, 80 W), the mercury vapor pressure and hence the luminous flux is determined by the composition and the temperature of the amalgam. The following happens during a start-up:

Up to 10 seconds

• Start-up amalgam warms up quickly
• Mercury evaporates from the start-up amalgam
• The lamp is bright at its ends (where enough mercury vapor is present)
  and pink towards the center

Up to 3 minutes (HO 49 W CONSTANT: up to 5 minutes)

• Mercury from start-up amalgam flag is completely evaporated
• The brightness of the lamp expands from its ends towards the center
• Operational amalgam warms up and gains equilibrium with the mercury pressure in the lamp

Due to the technical superiority of amalgam lamps that allows them to efficiently operate at a wider range of ambient temperature
(>90 % of the luminous flux in the temperature range of +5 °C to 70 °C / +20 °C to 80 °C for the T5 HO 49 W CONSTANT), 
the start-up time to reach a stable state is extended.

It is always important to consider conditions such as drafts, ambient temperature, emergency requirements, dim settings, etc.