Scaly’s guide #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
(http://i58.tinypic.com/2ahfcci.jpg)
(http://i41.tinypic.com/5oh9qf.png)
BA9s
(http://i60.tinypic.com/2n06dk2.jpg)
(http://i39.tinypic.com/1fag3p.png)
BA15s
(http://i58.tinypic.com/16h5lcy.jpg)
(http://i41.tinypic.com/352nhxt.png)
1157
(http://i59.tinypic.com/15ygh1g.jpg)
(http://i44.tinypic.com/x1x453.png)
HEADLAMPS
British Pre-focus
(http://i57.tinypic.com/11ad3pt.jpg)
British Pre-focus Halogen
(http://i58.tinypic.com/9svsq0.jpg)
Asymmetric
(http://i60.tinypic.com/9kxfep.jpg)
P45T - asymmetric equivalent
(http://i62.tinypic.com/4tvjip.jpg)
H4
(http://i60.tinypic.com/fn7jbd.jpg)
(http://i59.tinypic.com/2uhwa6h.jpg)