Ocean Spirit
Eating Ice Cream, skimming stones.
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I'm not entirely sure if it is still the case to be perfectly honest.Thank you for that! How come washers are a legal requirement? Seems a daft law if you dont need them with standard headlihhts.
Nor am I completely sure of the figures but as far as I remember, any dirt on headlamps can cause more glare to oncoming traffic so headlamps producing over a certain lumen count (brighter lights) had to have them fitted to reduce the likely hood of blinding glare increased by dirt. Hence not so critical for lights with less lumen count (dimmer lights effective less glare).
The odd thing is getting your head around the fact that dirt increases glare.