LED replacement lightbulbs

I've installed accessory lights on the sides of my Givi topbox - one set are used for turn signals, and one set are used for brake lights. Both sets have clear lenses. These lights use the standard 1156 incandescant bulbs with the small 3/4" globes. To make them demand a little more attention from other drivers I am thinking about replacing the incandescant bulbs with brighter LED bulbs. I've found some 1156 replacements on the superbrightleds.com website with various numbers of LEDs, beam spreads, and colors. I would use Red for the brake lights, and Amber for the turn signals, and would use a wide beam spread in both cases. I'm wondering if anybody else has tried this, and what results they got. Did it make a significant difference in the brightness? Was there any problem with too much heat melting the lense? Anything you can tell me will be helpful. Thanks!

I am actually sitting at my desk now making LEDs to fit inside the reflector of my givi topbox.

You won't need to worry about heat with LEDs since they draw less power and run cooler than similar sized incandescent bulbs. My LEDs are somewhat directional in nature but when I covered them up with the lens, the light scatters everywhere. Depending on the lenses you have, you may experience the same thing.

Once my soldering iron cools down, I'm going to go wire it to the bike. I'll have more info in a couple hours.

http://cgi.ebay.com/ebaymotors/OVAL-LED-STOP-TAIL-TURN-LIGHT-1-/270511430420?pt=Motors_Car_Truck_Parts_Accessories&hash=item3efbbcdb14

This is what I used,and there are more of different sizes.