Correct answer
Repair the fault using the manufacturer-specified replacement and check the lighting.
Repair the fault following the manufacturer’s instructions and check lighting operation. Use the specified bulb type and characteristics; if you cannot do it safely, use a workshop. Do not wait for another light to fail. For some paired headlamp bulbs, replacing both may be recommended to balance performance, but there is no universal requirement to replace two lights whenever any bulb fails. LED modules are not necessarily repaired by replacing a bulb.
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Wait at least ten days before dealing with the fault.
Ignore the fault until another light also fails.
Repair the fault using the manufacturer-specified replacement and check the lighting.
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