An ignitor generally needed start
the lamp.94
The Lighting Handbook
High-pressure sodium discharge lamps
–
High luminous efficiency and long
service life
– Satisfactory poor colour rendering
– Yellowish light colour
– Can dimmed steps
–
Use: industrial bays, street lighting,
outdoor illumination
Colour-improved (Philips SDW):
– Warm, white light
– Excellent colour rendering
– Use: retail areas
Functional description
Discharge the elongated ceramic discharge
tube determined sodium.
HST-DE
HST-CRI HST
The most important light sources
HSE
.
Philips colour-improved SDW produces very
good quality white light and popular
choice for lighting retail spaces. The light
therefore has yellow hue and only
suitable for specific applications. The current must limited a
ballast
