Which lights are brighter?
so what lights are the best to use to get the brighter light?
Well, there are two parts to this answer-
1, The lights that came in your car, restored, and
2, Those lights upgraded with the 'Mo Brighta, Mo Betta' dual tail light conversion, using
high output bulbs in all sockets.
Up until quite recently, rear lights generally used 'bayonet' style lamps, a round base with two pins on the side to engage the socket and provide electrical contacts to allow them to light up as needed. These old lamps use tungsten filaments that were far brighter than the Ni-Chrome wires developed by Sir Thomas Edison.
New filament designs with Krypton gas in the envelope allow higher lumen output. These lamps are Nickel base, as required by BMW. I have high output replacements for most all the important lights on your car - front and rear, and some side markers as well, plus more modern headlights.
My design for the E9 and other classic cars involves re-designing the brake light socket to accept a dual filament bulb for both tail and brake light service, more than doubling the size and tripling the output of the tail light, increasing brake and other light output, and increasing reliability of the rear lights by presenting a larger visual profile that makes the car easier to see, staying out of close calls and avoiding collisions more easily. And, with about any older car, there is room for improvement. BMW used four single filament lamps; adding more filaments for more light means 'bigger, brighter, more reliable' rear lights, period. More filaments means better communication and a safer car.
You cannot drive the car or truck behind you, but with better rear lights you make it easier for them to
see and understand your actions, and thus make it less likely you will need to exchange information and file a claim.
The name says it all: 'Mo Brighta, Mo Betta.'
My reasons for creating this design were two-fold, and very personal -- one, to avoid being rear ended again and again, and two, to help you in the same way. I have driven two cars for the last 35 years, both still running. Both BMW, of course - a 1972 2002 that was my college graduation present, and in 2004 I bought a 1986 535i.
I hope this answers your question. I look forward to helping you 'Be Seen, and Not Hurt,' and keeping that old classic on the road and out of the body shop.
Andy