I have not been happy with the brightness of the turn signals. They are small and look good on the bike - but they use a small 23 watt bulb turned sideways and there is no reflector. This causes the inside half of the lense not to be illuminated well as that is where the socket is for the bulb.
I found some really cool LED bulbs that are wired for 12V, have a high powered 1.5 Watt LED, and have a flat mounting surface with 2 sided foam tape already installed.
http://www.superbrightleds.com/moreinfo/led-wired-bolts/plm-series-wired-one-...This is the stock turn signal socket and light.

This is the stock housing with a stainless metal mounting plate I cut, along with 2 of the LED lights.

This is the light housing with the LED's mounted and wired.

This is the rear turn signals which have not yet been converted.

This is the much brighter LED's in the front turn signals.

The turn signals are now much brighter.....and hopefully can be seen better in direct sunlight where the original bulbs were inadequate.