the electric diagram of a Philips Biosol 11856 sunlamp
Philips Biosol 11856 sunlamp
the Philips Biosol 11856 sunlamp was equipped with automatic ignition
Basicly the same automatic ignition
circuit as with a tube light (TL), was used
to start medium pressure mercury vapour
arc discharge sunlamps like the Philips
Biosol 11856 on display here. Since
these discharge lamps lacked the
filaments of a tube light, an additional
resistor R provided the ballast and
current limiter for the starter. Also a
second and larger capacitor C2 was
added which, in combination with a
heavier coil, induced a sufficiently large
field that ignited the lamp at the moment
the starter contacts opened.