Fluorescent lights emit UV light internally, which is converted to to visible light by persuading phosphors on the inside of the tube, er, fluoresce. That means you can't have a point source, or anything close to it, so even with the mechanical issues sorted you'd still need an enormous reflector/lens to get a decent light pattern. White LEDs also fluoresce, but they're a smaller source - but usually only bright in bulk so again, they're a flood light rather than a spot. Fluorescents also have issues with slow starting and more subtly, reduction in light output over time rather than just fading.
HID lights require a high voltage (a few thousand volts) to strike the initial spark; thereafter they run at about 80v or so to maintain it. However, the spark can be interrupted by something as simple as earth bounce by turning on main beams, and it won't restart unless you have smart electronics which can recognise that - not always found on the cheap eBay units. On the other hand, the light is a small point source, so ideal for 'projector' type headlights (H1 and H7 types) but because H4 bulbs require both sources in the same shell, you have to use complex mechanical systems to go between main and dip. HID lights also take a few seconds to come to full brightness after an initial flash from the strike. HID lights as new fit require levelling devices, light washers, and also require that the dips remain on when the mains come on. They're also something of a legal grey area; they're not expressly forbidden on new vehicles since they're allowed in Europe, but they're not type approved so they're a constructions and use offence as a retrofit. It *may* be that you could get one through an SIV... but i'd hate to gamble on it. That said - HIDs are the best lights I've come across for projector lamps (I wouldn't use them on reflectors e.g. in H4 fittings or standard main beams); Osram Nightbreakers are the next best bet in a normal halogen H1/H7 fit. Neil -- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. To post to this group, send email to quantumowners@googlegroups.com To unsubscribe from this group, send email to quantumowners-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/quantumowners?hl=en IMPORTANT NOTE: All information presented herewith is provided on an "As Is" basis, without warranty or the implication thereof. Neither the Quantum Owners Club nor the individuals associated with the Quantum Owners Club or in the preparation of the above information shall have any liability to any person or entity with respect to liability, loss, or damage caused or alleged to be caused directly or indirectly by the instructions contained within this or related message(s).
