More confusion with LED headlamp bulbs and the UK MOT???
Yes because quite simply, the problem is that the market has been flooded with dirt cheap and nasty, badly designed LED headlamp bulbs , mass produced in China to be sold on eBay and the likes. People buy them because they're cheap. They fit them. They don't realign the headlamp to suit a change of bulb and because the bulbs have no beam in the first place, all the new bulbs do is dazzle other road users.
Bulbs require a reflector to reflect the beam. Original reflectors were made to reflect the light produced by a filament so any replacement bulb that uses the reflector must have the same characteristics as a filament if a satisfactory beam is to be produced.
People like myself have put 100’s of hours into designing and producing quality products. In the case of the older bulbs (pre H1, H3, H4 and H7) the problem has been LED chip size and power. Powerful (bright) chips produce heat. That heat has to be dissipated. Our H series bulbs have enough surface area to incorporate heat sinking into the design without the need to add extra metal. Our H series bulbs are made from aviation quality aluminium. Tiny, powerful chips are used to give a beam comparable to a filament.
Cheap eBay H4’s will incorporate a fan to cool the electronics because these bulbs are generally made to a poor quality design and from poor quality aluminium, tin or even plastic.
They use big cheap chips which give a terrible output.
Older type bulbs are far simpler and so have less metal to use as a heat sink. They also, unlike more modern bulbs are generally fitted from the front of the reflector (excluding BPF's) which means you can’t use that area to add a heat sink without interfering with the reflected beam. So, lower powered chips have to be used which are bigger. Bigger chips give a poor beam. Until now there’s been no other option.
Enter the PROJECTOR BULB............
LED projector headlamps are used on the newest cars. They don't require a reflector as they have a magnifier. The beam is pre defined by the projector unit before being magnified by the magnifier. In the case of making a projector "bulb" to fit old cars and bikes, the whole bulb structure can now be the projector unit and heat sink so small high powered chips can be used. At the front is the magnifier to magnify a small intense pre defined light into a usable beam.
From the front they even look like a filament bulb. No problems with heat either and no need to re-silver those worn reflectors. No worry about poor beams or dazzle. All the driver has to do is align his headlamps. The bulb gives the exact same beam pattern no matter what size or shape headlamp it is fitted to.
Only one problem arises with the projector bulbs in old cars. Some old cars used a tripod in front of the bulb (some pre war headlamps and post war Lucas P700’s). As the beam is projected from the front of the bulb, this tripod gets in the way. Don’t worry though as we’re working on a bulb for these lamps.
Hope this explains things a little.