I like using individual LEDs.
I have six yellow LEDs in each handguard.
They were cheap, and easy to install. I did the math,
and put one 51-ohm resistor in series with three LEDs.
I used LePage's liquid tape to paint over the connections inside
the handguards, and the indicators have been reliable for 3 years.
I am sure lots of people have done similar work, and others will follow.
The only thing that makes my installation unusual is simply this:
I draw power from the REAR turn signals, by tapping into a cable that
is inside the plastic under the left side of the seat. My idea is this:
there are lots of reasons for taking off the front fairing, and any extra
wires up front may give rise to breakage by people not expecting the wires,
or extra charges for extra work undoing and redoing connections.
I think that additional signal lamps up front are not so important as
extra signal lamps in the rear, and that is one of my planned improvements.