July/August 2023 - 30

L IGHT ING
process, " he said. " Furthermore, it is advisable to consult with
experts or industry professionals who specialize in aircraft lighting
systems to ensure accurate assessments of costs and benefits.
They can provide valuable insights and guidance throughout the
analysis process. Lastly, conducting regular reviews and updates
of the cost-benefit analysis is recommended, as technology and
market conditions may change over time. This will ensure that
the decision to upgrade or not remains current and aligned with
the aircraft's needs and financial goals. "
When to Upgrade
According to Hessling, there are certain circumstances and
environments where it makes more sense to keep using halogen
lights, for instance in extremely hot environments where temperatures
often times far exceed 120 degrees Fahrenheit. " From
a total cost of ownership perspective, upgrading should always
make sense when the aircraft is kept for more than two years.
Conventional lights would always need maintenance within such
a time frame, often multiple times, where LED lights would not, "
he said. " It is not so much a cost-benefit assessment that limits
upgrade, but lack of suitable technical options. From our technical
understanding, a simple replacement of bulb to LED will
become a very disappointing pursuit. LED units require different
design philosophies to achieve the expect lifetimes of years and
decades. Especially cooling, moisture and UV protection play a
role. Only units from major suppliers with approvals or recommendations
from original equipment manufacturers (OEMs) will
likely provide the expected benefits. "
When determining whether it makes sense to upgrade older
lamps to newer LED models in aircraft, several factors should
be considered, according to Fogel. " One important point is the
energy savings, indeed, if the aircraft operates frequently and
for long durations, the energy savings from LED lamps can be
significant, resulting in lower fuel consumption and operational
costs, " he pointed out. " Another factor includes the maintenance
costs given that LED lamps generally have a longer lifespan and
require less maintenance compared to older lamps. "
Fogel observed that LED lamps offer improved lighting quality,
including better color rendering, brightness control and reduced
glare so, if the existing lamps are outdated and do not meet the
desired lighting standards or requirements, upgrading to LED
lamps can enhance the overall lighting experience for passengers
and crews. " Furthermore, if there are upcoming regulations or
industry standards mandating the use of LED lamps in aircraft
lighting systems, it may be necessary to upgrade regardless of the
cost-benefit analysis. Compliance with regulations is crucial for
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July/August 2023

Table of Contents for the Digital Edition of July/August 2023
