9
VERTICAL MODE:
Follow the principle of
lamp
base up and lamp tip down.
This orientation keeps the
mercury away from the
cathodes and provides best
color temperature stability
and best color rendering.
DO NOT
operate fixtures with
lamp base in the down
position.
Color
can diverge
up to 400K and will get very
green.
HORIZONTAL MODE:
Even in the horizontal position
a slight rotation favoring the
lamp tips (lamp base higher
than the lamp tip) will allow
for better color temperature
stability.