528 / 578
www.thornlighting.co.uk
528
Bi-power
Rising energy costs and increasing
global pressures to reduce energy
consumption are making the need
to use energy more resourcefully
a strategic necessity. Many local
authorities have already taken action
to reduce power consumption of
street lighting which in some cases
involves complete switch off of
specific lanterns in certain areas of
towns and cities during defined times
of darkness when there is likely to be
very little traffic or pedestrian activity,
often only occurring after midnight.
An alternate method of addressing
the issue is by facilitating night
time dimming to reduce energy
consumption by using Bi power
control. This cuts energy costs and
delivers financial savings. It also
helps to reduce the associated
carbon footprint and enables
organisations to demonstrate a
commitment to social responsibility.
How does it work?
Bi power technology features
integrated power reduction to
reduce energy consumption and
light output. The standard setting is
50% dimming for 8 hours -
(3 hours before ‘calculated midnight’
and 5 hours after).
What is ‘calculated midnight’?
One of two alternate methods of
switching control are available
depending on the product in question.
Power Line switching (BPL) can be
employed from a remote time clock
or alternatively the control gear in the
lantern can include an internal clock
to allow it to operate autonomously.
This clock will register when the fitting
is switched on and off. After 2 days
the clock will calculate ‘midnight’ as
half the time of the burning hours. The
‘calculated midnight’ will be adjusted
based on the burning hours of the
previous two days.
What are the benefits of Bi
Power?
•Reduced energy consumption
•Rather than complete darkness the
lantern automatically reduces light
output by 50% for 8 hours
•Easy access to the function via an
integrated on-off BP switch on most
part of the products
•Extended lamp lifetime by reducing
the power and in turn, the stress and
heat it encounters
•No effect on colour rendering or
colour temperature
What products are available
with Bi power?
Many of the street lighting lanterns in
this catalogue have Bi power versions
already and more are being introduced
all the time. Both HID and LED lanterns
are available with Bi power control.
Consult the product pages for more
information.
Helping to save you energy
Avenue F LED
Oxane
Plurio
Dyana LED