<Li> <P> 20 March 1888: Completion of the first level . </P> </Li> <P> 20 March 1888: Completion of the first level . </P> <Li> <P> 15 May 1888: Start of construction on the second stage . </P> </Li> <P> 15 May 1888: Start of construction on the second stage . </P>

When did they put lights on the eiffel tower