Why don't the Lightforce lights fit? Where were you trying to mount them? Were they the 6" or the 9" size?
There is a lot of discussion about PIAAs on the AdvRider site. You see, while 4 wheelers may be interested in seeing while driving at night, motorcyclists are completely committed in the activity. So, night riding motorcyclists, like me, have looked long and hard at the various PIAAs and have a real feel for what works well, and what does not.
There is a direct correlation between reflector size and the amount of usable light that is on the road. That being said, a well designed and constructed projector lamp does a very good job as well. The next real issue is the size of the bulb. The more wattage the better (with the exception of arc lights which are out of the budget of most).
Here are my thoughts on auxiliary lighting I see on the road today. Driving lights, left on all the time (in the eyes of oncoming traffic) are for assholes. Fog lights provide adequate forward visibility and excellent visibility for deer and road debris, as well as cornering. Blue lights are for those that want to be noticed, as the color is worthless for picking out things of natural colors. I go with Peas Ion lenses as the pale yellow matches the color of lenses skiers and shooters prefer for enhanced depth perception.
The construction of the PIAA lights is the best. I am sure the Lightforce and a few others are there also. The PIAA 910s use a big H1 bulb available everywhere. The Ion lens adds the pale yellow. The PIAA 520s have a great reflector and provide a superior fog pattern. I have been driving years with the same bulb in these (through snow, rain, creeks, mountain trails, etc...).
The new PIAA 510s, are a smaller 520. As such, with a bigger bulb, I think they may be OK. Remember, either a big reflector or a well-made projector. That is if what you want is to see well at night.
