OK, here we go....
Night diving is great fun, but there are some things to be aware of before your first dive.
Most important.....Tell someone where you're going, so if there is a problem, you don't come home etc, they know where to start looking for you. Go with a dive buddy if possible, it keeps the lady folk happy.
Choose a sheltered beach or cove you're familiar with during the day, and use house lights or street lights for reference. When we dive remote beaches, we tape a blue/yellow cylume to a 6ft bamboo pole and stick it in the sand so we know where to get out.
Use a shorter gun if you have one. A 75cm single band is ideal. You don't need a double band, triple wrapped 120cm monster gun.
Take a bright main torch and a backup torch. If your main torch fails, your backup will at least get you out of the water and safely up the shore. A small torch clipped to your mask strap is ideal for this and is perfect for sorting out a shot fish.
Leave your float at home! At night you need to adopt the KISS principle, simple belt stringer will suffice. You do not want to be faffing about in the dark with 60ft of tangled float line, shooting line, and an angry 8lb bass that doing its best to wrap you up in it all.
Don't bother with those little glow sticks. If you can't see your buddy when they have a 1000 lumen torch, you won't see a tiny green glowing dot.
Have a very sharp, secure and easily accessible knife that you can find every time.
If you're diving near one another, help each other out when you do shoot something. Two torches and four hands make things way easier at night.
You generally won't need to dive deep, 4m max really. A lot of the fish will be shot from the surface. Each beach will fish differently, but as a general rule, three hours into a flood tide is good. Have a look on Google maps or a site called Zoom Earth, pick a beach close you you that you like the look of, and go dive it. A barren dive site in the day usually comes alive at night, so don't write off places before you give them a go.
Lastly, have a flask of hot beverage for when you get out. Hot Ribena is great.