They use the same light bulbs in the x308, so I'd think that means equal brightness (unless more voltage is applied to the brights?) - is the difference just in the alignment of the height that the beams point?

 

You have to use the correct wordings:

Headlights or headlamps are the lights/lamps at the front ( head) of your vehicle and do not describe the type of lights

What describe it is either low or high beam

To answer the question, while some cars have different bulbs for low and high, a lot of vehicle use the same bulb

What make it a low or high beam is the shape of the reflector and therefore the shape and reach of the beam, as in low or high, of light

 

Sooo, it is just the reflector that changes? And only in projection-height from the ground?

 

No...to enlighten (s'cuse the pun) all four light units on an X308 are at the same physical height from the ground.
All four units use the same H7 halogen bulbs of 60watts output.
The difference in achieving either low or high beam is the actual shape of
the reflector at the back of the light unit.
As these light units age they get a 'blume' build up on the inside of the reflector and the glass and it's a simple matter of removal and actually washing them in dishwasher fluid and replacing the globes with Phillips
X-Treme Vision H7 globes....these will increase light output at least three times and provide a very good light at minimal expense.
Making sure of course that the light units are properly aligned helps
as well ;o))
If you would care to view my Powerbase pics, it gives you a good idea how to do this ;o)
http://www.pbase.com/padme002/clean_lights

 

I was going to write a post about female endowment and cold temps, but thought the better of it.
Vector