Adhesives
Electrolube Solves
LED Potting Problem In India
Electrolube’s Indian subsidiary solves
an LED lighting unit potting problem,
following consultations with the
company’s UK based technical
division. The resin encapsulation was
causing an unacceptable colour shift
in the light from an LED strip
luminaire, and the UK technical team
had little more than 24 hours to come
up with a solution.
T
he Indian LED lighting systems
specialist, Rockforest
Technologies India Pvt Ltd, was
recently contracted to supply LED strip
lighting units for luminaires destined for a
shopping complex in Bangalore, India. The
specification stipulated that Rockforest’s
LED lighting strips should provide a
‘neutral white’ (4,000K) colour and that
the LEDs in the luminaires be potted in
order to protect them from adverse
environmental conditions.
Electrolube India conducted some initial
trials, potting the strip luminaires to a
specified depth of 5.5mm using
Electrolube’s UR5634, a semi-rigid,
optically clear polyurethane resin that is
widely used for encapsulating LED lighting
systems. With excellent protective and
decorative properties, the UR5634 resin is
also highly UV resistant, making it
especially useful as an encapsulant for
applications exposed to direct sunlight.
In this particular application the resin
ELE Times | 14 | November, 2016
caused a colour shift from the LED array,
from the specified 4,000K (neutral white)
to ‘cool white’ (6,500K). Rockforest was
under considerable pressure to solve this
problem as the 4,000K colour was a nonnegotiable specification; moreover, their
customer requested that a new reference
sample, which met the 4,000K colour
specification, be made available for retesting in just 24 hours.
Electrolube India’s General Manager
Padmanabha Shaktivelu, needed to act
quickly in under 24 hours to help
Rockforest meet this very tight deadline,
so he approached Electrolube's technical
support team in the UK for advice.
Responding immediately to Padmanabha’s
request, the UK team suggested two
different approaches that Rockforest
might consider in order to solve the
problem.
The first of these was a recommendation
that they use an LED that provided a
colour temperature below the specified