You are right. It is the reflector, not the bulb that determines the light pattern and cutoff. I don't know where that theory came from. All H7 bulbs have the filament on the same axis.
I think the issue comes up when using lights that don't have a filament.
I agree with DJFire. While there is always a chance that the housing can handle more heat than it was designed for, using higher wattage bulbs is a potentially expensive risk to take. Those housing [sic] are not cheap.
Emphasis is mine.
One could label most things as a "
potentially expensive risk" to take.
When I started the process of upgrading the lights on my Goldwing, I based my decision, partially, on the experience and expertise of others who have dealt with this problem before.
Most of the folks on the LD Rider list were using aux lights to augment their stock lighting system but I did not want to go to the complexity or cost of getting aux lights.
A couple of responses were from well know LD riders who had been using H7 rally bulbs in their Goldwings. Both responders had been using Rally bulbs for years in both high and low beams and both were very happy with the results.
On that basis, I decided to use Rally bulbs and, so far, no problems.
So, while using Rally bulbs is a "potentially expensive risk" every indication is that there is zero
actual risk.
Added to that, Honda did not build in any fudge factor in the wiring.
Just for grins, what
is the maximum amperage for the wiring on that circuit?
For a 55 watt bulb, it's handling 55/12=4.58 amps and for rally bulbs it's handling 6.67 amps so I'm wondering how much "headroom" there is?