short light
'Luz corta' is a Spanish term directly translating to 'short light' in English. However, in a practical context, it is usually used within the field of automotive vocabulary. It refers to the configuration of a vehicle's headlight beam, being 'short' or 'low', as opposed to 'luz larga' or long (high-beam) light. This is a term you would typically encounter while talking about driving or car-related matters.
You should use low beam light in this area
The phrase is instructing the person to use low beam light in certain area. 'Luz corta' is often used in Spanish to refer to 'Low-beam light / dip beam', especially in driving context.
I forgot to switch to low beam light
The person speaking forgot to switch their vehicle's lights to the low beam. The phrase illustrates a usage of 'luz corta' in a sentence when a person forgets to change their vehicle's lights.
Low beam light is suitable for this road
The phrase is stating that using low beam light (luz corta) is suitable for driving on the specified road. This provides an example of how 'luz corta' can be used in context relating to driving conditions.