Hi-

I read the advice from Pinside at the bottom of this thread, but I'm resurrecting it because it was helpful in my quest to fix my own Balrog light, and current info is hard to find. I thought I'd tack on a solution for 2019.

Previous owners of my LOTR had switched to the 44/47 (9 mm) bayonet mount (probably from the Stern kit described in the bulletin), but the LED in there was broken. I of course tried to put in a standard 5V 44 bulb, and it burned bright for several seconds until it burned out.

Here is a link to a now-discontinued bulb, provided by DCFAN
https://pinside.com/pinball/forum/topic/lord-of-the-rings-balrog-led#post-480508

At Super Bright LEDs, I found BA9s LED bulbs with 9 mm bayonet base, operating in the range necessary for the 12.6V flasher voltage. The five 5050 SMD LEDs on the bulb emit light in 360 degrees. I chose & installed red, but also bought warm white just in case.
https://www.superbrightleds.com/moreinfo/ba9s-ba7s/ba9s-led-bulb-5-smd-led-tower-ba9s-retrofit-car/2077/4725/

I had to switch the polarity in order for the BA9s LEDs from SuperBrightLEDs to work, by re-soldering the wire leads to opposite sides of the bayonet mount inside the Balrog.

This update also applies to these old threads:
https://pinside.com/pinball/forum/topic/lotr-balrog-flasher-inferno
https://pinside.com/pinball/forum/topic/lord-of-the-rings-balrog-led
Useful info to remove parts to get at light here:
https://rec.games.pinball.narkive.com/XSWhLdtc/replacing-the-flasher-for-balrog-on-lotr
(I see LTG was helping people at r.g.p. a long time ago!)

A video of the Balrog at the beginning of FOTR multiball:

Finally, some pictures of the Balrog at game start, during a Bash Balrog sequence, and of the LED.
Balrog_StartGame (resized).JPGBalrog_Bash (resized).JPGSuperBrightLEDs_BOM (resized).JPG