I was looking at them as well, Speakers, I guess I'll just need to save a few more pennies before I can spring for those. No rush, thanks. In any event, as I'm stuck in the snow anyway, I'll do some research on the components of a HID optical system. I'm interested in how the lense and reflector differ from a halogen system. I know the difference between the two bulbs and how they operate, I wonder if the lens on a HID system has a different refractive index as compared too a Halogen system.
Cheers
OK - here goes. There is first hand experience behind all this. I have a mate who was making a packet selling HID systems - I got masses of R+D materials from him real cheap (free)
In a patterned reflector - plain glass unit - A CORRECTLY DESIGNED HID BURNER (more on this later) will put light exactly where it's halogen counterpart would. It's a mirror - no refractive effect. But if the reflector is useless - the HID wont help. And the Triumph reflector is ruddy useless. Huge luminescent losses. Here's how you know. Stand in front of your bike and look at the bulb filament - if you can see it then light can escape there - this is scatter.
In a plain reflector - patterned lens (refractors) unit then yes it makes a difference - you need 4300K HID burners.
The MAIN ISSUE IS that most after-market burners DO NOT position the burners point of emission where the bulb filament would be. This can be a plus - but in the main is a GIANT minus.
In poly-ellipsoidal light units (Bulls eye) - you can use 6000K but 5000K is better. 4300K not so good. 5000K is what most of the OEM Car HIDs are.
Also be aware that whilst the burner may only use 35W - the additional hardware HID's need consume power - generally about another 10W. And finding a place to fit that additional hardware is a PITA on an unfaired bike. It also needs to be in a coolish place - i.e. NOT under the tank on top of the engine.
The 5&3/4" light unit is by definition VERY restricted in efficiency when using an H4 bulb. Basically it's not (and cannot be) deep enough to take full advantage of the H4 filament positions - esp DIP beam. There is evidence to suggest a 35W sealed beam unit will put more light ON THE ROAD than an H4 bulb unit. The filaments are in the right place.
5&3/4" LED. You have a choice - Either J.W.Speaker OR the new Harley DAYMAKER.
The old Harley Daymaker was identical to the JW-Speaker. It took some fiddling to fit.
The NEW DAYMAKER is made by Speaker for Harley ONLY. And it seems to drop straight in - no modding.
It also operates differently - the old units were DIP or MAIN. The new Daymaker is DIP plus MAIN. The Harley logo is tiny (basically the position light).
I have JW-Speakers in because the new Harley was not about and the old Harley was NOT € approved whereas the JW Speaker was. The new Harley is € approved. The PLUS from buying JW Speakers is a better waranty
7" - there are more options and cheaper.