@M E They are brighter and whiter, with a very defined cut-off pattern. They run at a lower wattage than normal bulbs but with greater output. I left the rubber boots off the back of the reflectors but you may be able to install these. You will also need to find space for the two resistor packs which come attached to the bulbs - mine tucked away neatly inside the nosecone. To compliment them, I have also replaced the side lights with some LED W5Ws and these looks very good. You may need to check they are legal in your area.
