De or het lichttoetreding?

The correct Dutch article is:

de lichttoetreding

Rule Words ending in -ing: almost always de. See the rule

How to use lichttoetreding

the lichttoetredingde lichttoetreding
this lichttoetredingdeze lichttoetreding
that lichttoetredingdie lichttoetreding
our lichttoetredingonze lichttoetreding
your lichttoetredingjouw lichttoetreding
every lichttoetredingelke lichttoetreding
which lichttoetreding?welke lichttoetreding?
a big lichttoetreding / the big lichttoetredingeen grote lichttoetreding, de grote lichttoetreding

Dutch words ending in lichttoetreding

daglichttoetreding

In compound words, the last part decides the article. See the rule