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[Scalyback]

Scaly's guide No.1 - Bullet lamp identification.
Most web sites now use a standard coding for lamps (bulbs)



For a Bullet these are (usually):-



BA7s - Speedo Illumination and Ammeter lamps

BA9s - The tell-tale lamps in the speedo (indicator, high beam, neutral). Also the 'Tiger's Eye' pilot lamps.

BA15s - Indicator or trafficator bulbs. These need to be bi-directional if LED.

1157 - The stop/tail lamp.



The headlamp bulb will depend on the unit fitted.




BA7s










BA9s










BA15s










1157











HEADLAMPS

British Pre-focus



British Pre-focus Halogen





Asymmetric



P45T - asymmetric equivalent





H4

[Thack]

That's totally brilliant - thanks, Scalyback. Just one word of warning to people considering changing to LED bulbs: check the legalities before using them. Not all LED replacement bulbs are legal for use in motor vehicles, because not all of them have the necessary spread on the beam. The fact that it fits and lights up does not mean it is legal for road use.

[Texas John]

This is a nice start on the information to find replacement bulbs, but could use a few more details. So I searched them out.

RE #141711 Bulb, 12V 2W BA7s. Speedo & Ammeter Illumination. Trade# 3898; T2.1/2, 0.17A, 7.5 Lumens, 0.6 MSCP, Life 200 Hours.

RE #141715 Bulb, 12V 2W BA9s. Tell­tale lamps in the speedo (indicator, high beam, neutral) and 'Tiger's Eye' pilot lamps;
Trade# 12MB; 0.17A, T2.75, L=1.2 in (30 mm), Life 200 Hours. Sugg LED is 4-LED, 32 degree, 12V.

RE #141759 Bulb, 12V 21W/5W. Stop/Tail Lamp Bulb. Trade# 1157.

RE #142721 Bulb, 12V 10W BA15S. Turn Indicator (Trafficator) bulb. Trade# 5008; 0.83A, 10 MSCP, Length 2.25 in (57 mm). These need to be bi­directional if LED.

[Texas John]

By the way - what is a bi-directional LED? I have not heard of this before. If referring to polarity, most LED offerings are going to assume negative ground. I should not speculate and await clarification.

[Scalyback]

Bullet indicators!



terrible mess of design, all because they only used the one indicator tell tale and not two!



the power goes through the tell tale one direction for left, the other direction for right.

when you signal left, the power goes through the tell tale, and then earths through the right lamps. you won't see the right ones light as the current is too small, but if you have one way polarity led bulbs, then the tell tale won't work. all reversed for right signal.


Who wants to explain this rather better than I did guys?


Only real option, use two directional LED tell tale BA7s (Superbright LED's one works,) install led BA15s in the rear left and right, but keep traditional bulbs in the front indicators. You will need an electronic flasher unit about a fiver or under $10 US.

[Scalyback]

Forgot to say, Thanks for the extra info Texas John.

[Scalyback]

Bullet indicators!


And screwed up above, should read



Only real option, use a bi-directional LED tell tale BA7s (Superbright LED's one works,) install led BA15s in the rear left and right, but keep traditional bulbs in the front indicators. You will need an electronic flasher unit about a fiver or under $10 US.
This works with my 1994 bullet.

[Norm]

Scaly I have done it by using the single high intensity neg earth LED in the indicator light, bit of messing around but it worked well

[Adrian]

Just to confuse things, most of the smaller bulbs are also available in quartz halogen as well as normal filament and LED. A.

[papasmurf]

Asymmetric, my wife used to have a 250 Cossack with a headlight bulb like that.