All LED FC: Drop in Chinese LEDs and 5 Arm Spider LED Tails
 

Alright I purchased a bunch of LED's from ebay.

Pair of Amber 1157 FC Front Blinker/Running Light (need one pair) $8.80 shipped
http://www.ebay.com/itm/GP-Thunder-Pair-1157-1154-2057-2357-2397-3496-1034-SMD-18-LED-Light-Bulbs-Amber-/161028011213?pt=Motors_Car_Truck_Parts_Accessories&hash=item257e0474cd&vxp=mtr

Pair of Amber T10 168 194 FC Front Side markers (need one pair) $3.10 Shipped
http://www.ebay.com/itm/2x-Amber-SMD-4-LED-12v-T10-Wedge-Interior-Instrument-Map-Panel-Gauge-Light-Bulbs-/300909562436?pt=Motors_Car_Truck_Parts_Accessories&hash=item460f9b8a44&vxp=mtr

Pair of Red T10 168 194 FC Rear Side markers (need one pair) $3.10 shipped
http://www.ebay.com/itm/2x-Red-SMD-4-LED-12v-T10-Wedge-Interior-Instrument-Map-Panel-Gauge-Light-Bulbs-/370820474878?pt=Motors_Car_Truck_Parts_Accessories&hash=item56569f67fe

Pair of Short 1156 FC Tag light (need a pair no longer than 3.3cm) $4.50 shipped(untested)
http://www.ebay.com/itm/8-SMD-5050-LED-White-1156-BA15S-1141-3497-Bulbs-Turn-Signal-Corner-Tail-Lights-/200740574319?pt=US_Car_Lighting&hash=item2ebd12146f

Pair of Cree Magnified LED FC Reverse Lights (need one pair) $12 shipped(untested)
http://www.ebay.com/itm/2x-1156-Ba15s-CREE-Q5-7W-White-High-Power-LED-Reverse-Light-Bulb-PEUGEOT-/300903513840?pt=Motors_Car_Truck_Parts_Accessories&hash=item460f3f3ef0&vxp=mtr

Individual Red 1156 FC Third Brake Light (need only one) $5.34 shipped
http://www.ebay.com/itm/13-SMD-13SMD-360-1156-RED-5050-5055-LED-AUTO-TURN-SIGNAL-12V-TAIL-LIGHT-BULB-/170877311046?pt=Motors_Car_Truck_Parts_Accessories&hash=item27c914d846&vxp=mtr

Pair of Interior Dome lights (only one needed) $1.40 shipped (untested)
http://www.ebay.com/itm/2-x-31mm-4SMD-5050-White-LED-Festoon-Interior-Dome-Light-Lamp-Bulb-3021-3022/221230264202?rt=nc&_trksid=p2047675.m1851&_trkparms=aid%3D222002%26algo%3DSIC.FIT%26ao%3D1%26asc%3D261%26meid%3D7852492244829639378%26pid%3D100005%26prg%3D1088%26rk%3D1%26sd%3D150723700887%26

Pair of Interior Map lights (two needed) $3.10 shipped
http://www.ebay.com/itm/2x-White-SMD-4-LED-12v-T10-Wedge-Interior-Instrument-Map-Panel-Gauge-Light-Bulbs-/390600129992?pt=Motors_Car_Truck_Parts_Accessories&hash=item5af194fdc8



So far all of those bulbs add up to $43 something. Also, instead of some of the more typical 1157 LED replacements, I opted to go with the 5 arm spider asterisk looking things for the rear tail/brake and the turn signals.



Pair of Amber 1157 5 Arm Spider FC Rear Blinker (need one pair) $26 shipped
http://www.ebay.com/itm/2X-40-SMD-40SMD-1156-3528-AMBER-LED-SPIDER-5-ARM-TURN-TAIL-BRAKE-STOP-LIGHT-BULB-/350746785953?pt=Motors_Car_Truck_Parts_Accessories&hash=item51aa2338a1&vxp=mtr

Pair of Red 1157 5 Arm Spider FC Rear Tail/Brake Lights (need two pairs) $46 shipped
http://www.ebay.com/itm/2PC-1157-5-Spoke-Arm-Spider-Lite-Red-40-SMD-LED-Tail-Brake-Signal-Light-Bulb-12V-/360652787948?pt=Motors_Car_Truck_Parts_Accessories&hash=item53f894d0ec&vxp=mtr

I installed the red LED spiders earlier today and they just barely squeeze into the tails. They do look pretty good though, maybe not as good as the LED rings, but it is a lot less work.
They do have some noticeable brightness differences, but I plan to smooth that out with some weak resistors.
I'll try and get some better pictures of them, hopefully after I get them balanced in brightness.

Very interested in seeing the turn signal and side lights. Are there any led options for s4 tails?

I'd need to see the lights in the day to judge whether any if the exterior lighting is worth it. Did you make sure the LEDs are rated for greater than or equal to the stick bulbs at the voltage you will be running?

I've looked at elef before for S4 tails. Robxx7 has a thread on putting them in his s5. They are bright.

I'll get some better pictures soon. I would say all of the running lights are just a bit dimmer. The brake and blinkers are near stock brightness though. I also have the "modernized" S5 tail lights, which really makes the taillights way too bright.