It’s obvious that a dive light is necessary to scuba dive at night to help you navigate, see your gauges, and observe interesting aquatic life. But it’s also a good idea to carry a light during the day to peer inside wrecks, see under ledges and light up caverns. You’ll use it on all your scuba diving adventures to look into the cracks and crevices where shy creatures hide. Visit your PADI Dive Center or Resort to get advice about dive lights.
Primary lights are generally large models with powerful, wide beams, however, you can also find very bright small lights. Backup lights are usually smaller with narrower beams – something you might carry on every dive and definitely on night dives so you don’t end up without a light if your primary light fails.