I have run these lamps in my last 2 FLHTs. Great lighting, compared to the useless stock lamp. I run 55W100 Hella bulbs, that I buy off EBay for around $4.00 . I am well satisfied with the lighting, for the money, you cannot go wrong. Marchal lamps are another option, as well as Cibie.

 

Any of the E-code lamps is better than the stock POS that HD puts on these bikes. I have a Hella E-code in my Night Train and love it. The stock lamp had a big dead spot right in the middle of the beam.

 

From the web link posted-

This premium genuine Bosch 7" (180mm) headlamp lens-reflector unit is DOT certified to the SAE J584 motorcycle headlamp standard, revision 76, for use throughout the United States, Canada, and all other countries where traffic drives on the right-hand side of the road and SAE/DOT headlamps are permitted or required. The reflector is Swedish; the lens and final assembly are German. Heat-compensating aluminum bulb seat, steel reflector, and hard glass lens. Includes silicone rubber seal boot.

 

wonder what would happen if you used this headlamp with a HID headlight?

 

It would be a lot brighter!

Joking aside the better a beam a headlamp gives with a normal bulb, the better it will be with a more powerful bulb like HID.