Attaching
LEDs
to
the
Heatsink
The
heatsink
has
many
little
holes
in
it.
Two
little
holes
are
used
to
secure
1
LED
to
the
heatsink
–
one
at
each
end
of
each
LED.
We
need
to
apply
thermal
grease
to
the
back
of
each
LED
and
then
attach
it
to
the
heatsink.
Thermal
grease
ensures
proper
thermal
conductivity
of
heat
away
from
the
LED
into
the
heatsink.
A
very
small
dab
of
grease
on
the
back
of
each
LED
is
all
that
is
necessary.
More
is
NOT
necessarily
better.
Too
little
will
lower
conductivity
and
too
much
will
create
a
mess.
A
thin
layer
works
best.
The
photo
below
is
about
how
much
you
should
use.
After
the
thermal
grease
has
been
applied
to
the
star,
screw
it
into
the
heatsink
with
two
little
screws,
adjusting
the
height
of
the
two
fastening
screws
to
center
the
LED
between
them.
Once
again,
do
not
over
tighten.
The
screws
should
be
snug
but
not
tight.
When
screwing
down
the
LEDs,
ensure
the
screw
is
not
touching
any
solder
or
solder
pads.
This
will
ground
the
string
at
that
point
and
cause
strange
behavior
and
possibly,
damage.
