The lights on my cube van box are not coming on..

( UPDATE: Played with the light switch and they came on again.. thanks all! )

its just the lights on the very top of the box, I circled them in yellow with photo-shop just to show you..

all the other lights work on the box, blinkers, brakes, backup, and running lights..

is there a fuse for the lights on the top ? and if so what fuse and where?

thanks for anyone's help, I really need them to work for night time driving.

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