thats good to know redThese projector bulb have a HF filament in them which throws an oval beam where the VF equivalent throws a spot beam.
HF=horizontal filament/VF=vertical filament... Tried the HF and they are rubbish and they have half the range of the VF.
Red Dot what bulb is the betterPrior to finding the link above i bought one from Bushys @ £9.50 for the correct bulb and the vertical 100w are £6.50 but shine a wide and dull beam.
Going to order some spare as the vertical filament have a shorter life.