What’s common between diving and glow stick? Nothing if you dive under bright sun shining in warm nice day. But if you want to dive at night? In this case glow stick is a thing that isn’t useless to get with you.
From the very beginning you must realize that night diving is much harder and it is better to do it with an experienced instructor. Check batteries for your lighting units. Choose place that you know already well during daytime diving. Get with you food rich in calories and drinks to compensate energy.
Yes it is not a simple thing. But from the other hand when and where you’ll see all these nocturnal sea creatures?
Glow stick is not a lighting unit and can not substitute them to find your way at night under water. But it is useful to mark the place where you started your night journey from. For example if you dive from a boat or have other reference point.
You may try some horrible things. Turn off your light for a moment. Only glow sticks mark you and your companions. How will react nocturnal inhabitant of the sea on this faint light of glow sticks?
Some people like night diving saying that is unforgettable. Others say they did it last the time in their life. One is for sure. This joy is for experienced divers.
So under sea glow stick adventure is up to you.