Gentle soul’s first to cry over what may go on after dark? (5,5)

'over what may go on after dark?' is the definition.
I know nothing about this answer so I can't judge whether this works.

'gentle soul's first to cry' is the wordplay.
'gentle' becomes 'light' (synonyms).
'soul's first' becomes 's' (bst letter of 'soul').
'to' means one lot of letters go next to another (I've seen this in other clues).
'cry' becomes 'bulb' (I can't justify this - if you can you should give a lot more credence to this answer).
's' after 'bulb' is 'bulbs'.
'light'+'bulbs'='LIGHT-BULBS'

Can you help me to learn more?