Perhaps you have a non-GT BD Cerato, with the always-on halogen daytime running lights?
Or perhaps you're looking for a little more light output from your reverse lights?
A lot of people don't really like the off-white colour of the halogen bulbs or they find them too underpowered, so that's where an LED replacement comes in.
Replace your stock halogen bulbs with these white LED bulbs instead!
BAY15D / 1157
These bulbs are referred to as "dual filament" bulbs, used most commonly as brake lights on base model cars, they are also used also in the entry level Cerato models as daytime running lights (DRLs).
Available in White and Red - Lights are all sold as pairs