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Energy-saving lamps and their impact on photosensitive and normal individuals.
[erythropoietic protoporphyria]
A
preliminary
investigation
showed
that
ultraviolet
radiation
(
UVR
)
emissions
from
compact
fluorescent
lamps
(
CFLs
)
can
pose
a
risk
to
the
skin
of
photosensitive
individuals
.
To
carry
out
a
larger-scale
study
,
in
patients
with
a
range
of
photodermatoses
,
to
assess
this
risk
.
To
determine
a
safe
alternative
light
source
for
photosensitive
individuals
.
To
investigate
if
CFL
emissions
have
the
potential
to
induce
skin
responses
in
normal
individuals
.
Two
hundred
patients
were
directly
exposed
to
a
single
-envelope
CFL
as
part
of
their
routine
management
.
Irradiation
was
carried
out
on
the
inner
forearm
with
lamps
positioned
at
5
Â
cm
.
Skin
assessments
were
made
immediately
and
24
Â
h
postirradiation
.
Eleven
of
these
patients
were
further
tested
to
a
double
-envelope
CFL
.
One
hundred
and
one
patients
were
tested
to
emissions
from
a
light-emitting
diode
(
LED
)
.
A
study
involving
20
healthy
individuals
was
carried
out
with
exposure
to
the
single
-envelope
CFL
.
Skin
erythema
was
induced
by
the
single
-envelope
CFL
in
the
following
cases
:
16
of
53
chronic
actinic
dermatitis
,
seven
of
52
polymorphic
light
eruption
,
five
of
nine
solar
urticaria
,
one
of
two
actinic
prurigo
,
one
of
one
erythropoietic
protoporphyria
and
two
of
20
healthy
subjects
.
The
double
-envelope
CFL
eliminated
or
reduced
the
skin
response
in
all
11
patients
tested
.
The
LED
did
not
induce
any
UVR-provoked
skin
responses
.
UVR
from
CFLs
can
aggravate
the
skin
of
photosensitive
and
healthy
individuals
when
situated
in
close
proximity
.
Double
-envelope
lamps
reduce
this
risk
.
LEDs
offer
a
safer
alternative
light
source
that
eliminates
the
risk
of
UVR-induced
skin
erythema
.
