A:Answer Greetings,
Let us help you with the light of your refrigerator.
I have shared a Samsung link below that indicates the few steps to perform if the bulb is not turning on.
Here's the link: https://www.samsung.com/us/support/troubleshooting/TSG01109322/
Since the link above mentioned the sabbath mode, and this model has that feature, you can check it on the model's user manual link below on page 44.
Here's the model's user manual link: https://downloadcenter.samsung.com/content/UM/202007/20200728002937594/DA68-04012L-00_FDR_RF6000T_ND__EN-MES-CFR__USA.pdf
Also, if the internal or external LED lamp is out of order, kindly contact a local Samsung service center.
Here's the link: https://www.samsung.com/us/support/service/
If you have inquiries and need further assistance in the future, please contact us via the following options below:
1. Facebook Messenger: http://m.me/samsungsupport
2. Twitter: https://twitter.com/messages/compose?recipient_id=18768513
3. Samsung Community: https://us.community.samsung.com/t5/Samsung-Community/ct-p/us
When you message us, please provide us with this reference number 1145754478, which will help our team pull up your information.
^Rainly