There are two 'l sound' formations--also known as allophones of the 'l sound': a 'light l' and a 'velar' (or dark) 'l'. The 'velar l' is represented by the International Phonetic Alphabet symbol /ɫ/.
The following is a description for the light l; hereafter simply referred to as the 'l sound' /l/.
Reference: https://pronuncian.com/pronounce-l-sound