There is a tab you have to depress and then pull out be careful plastic gets brittle with age just like me.

You can see the tab at the upper right of the part, it might be easier removing the light assembly
Buy the led bulbs with a color temperature 2700-3000 if you want warm white I don't care for the stark white color https://www.ebay.com/itm/Zone-Tech-5...wAAOSwZtpe2lx4