When an object hits a glass headlight with reasonable force the damage is such that a hole, through which moisture can penetrate, is created. This is reason to fail your WOF/COF, as the moisture will not only mist the reflector thus reducing light output, but can also alter the beam causing glare to other road users.
GB Glass apply a headlight skin which not only seals the headlight but also protects against further damage.
Plastic lenses can become cloudy and discoloured. This is owing to oxidation caused by U.V. light and also reduces light output which can cause failure of WOF/COF.
GB Glass can restore most lenses to a like-new condition, either at our premises or at yours, for a fraction of the cost of a replacement set of headlights.