Scubapro Novalight 250 Three-Mode Mini Torch Dive Light

Lumens measure the total light output, but they say nothing about how that light is shaped, so a tight narrow beam can look far brighter at distance than a higher-lumen wide beam. Beam angle, color temperature, and water clarity affect what you actually see as much as the lumen figure does. Use lumens to compare lights of a similar beam type rather than as a single score of quality.

A primary light is your main light, usually brighter, larger, and with a longer burn time, while a backup is a small, simple light carried in case the primary fails. Any dive where you need a light to exit safely, such as a night dive, calls for carrying at least one backup. Backups are chosen for reliability and simplicity rather than for maximum output.

Burn time and brightness trade directly against each other, so the same battery run at a lower power setting lasts substantially longer. Manufacturers usually quote burn time at each power level, and many lights automatically step down output as the battery drains or the head heats up. Treat quoted figures as fresh-battery, ideal-condition numbers and plan for more burn time than your dive actually needs.

The o-rings sealing the battery compartment are what keep the light from flooding, so inspect them for grit, hair, and nicks every time you open it, and wipe the sealing surfaces clean. Lubricate lightly with the grease type the manufacturer specifies, using a thin film rather than a heavy coat, because excess grease attracts sand. Replace o-rings when they look flattened, cracked, or dry, and do not over-tighten the cap in the hope of sealing a bad o-ring.

Lithium batteries are subject to airline and regulatory limits that vary by cell chemistry, watt-hour rating, and whether the cells are installed or loose. As a general rule lithium cells travel in carry-on baggage rather than checked baggage, with terminals protected against short circuit, but you must confirm your airline's current policy and any local rules before you fly. Carrying the manufacturer's battery specification sheet helps if you are questioned at screening.

Rinse it in fresh water after each dive day and work the switch while it is submerged so salt does not crystallize inside it, then dry it before opening. For storage, remove or charge the batteries as the manual directs, and leave the cap loose so the o-ring does not take a permanent set. Never store a light with corroded or leaking cells inside it.

Test it briefly as part of your pre-dive check, but do not leave a powerful light running in air, because many are designed to shed heat into the water and can overheat on the surface. Check the manual, as some lights have thermal protection that dims or shuts them down when they are dry. Testing before you gear up is far better than discovering a dead light at depth.

No. The Novalight 250 ships as the light only, and the single CR123 cell is not included. You can run either a rechargeable CR123 or a disposable one, and Scubapro notes that disposable CR123 cells have a 10-year shelf life, which makes them a convenient spare to keep in a save-a-dive kit. Expect up to 1 hour of burn time at 100% power.

The Novalight 250 uses an end-cap push-button switch that cycles through 100% power, 50% power and Flash. The button is designed to be pressed with dive gloves on, so you can change modes without removing a glove.

It is rated to 150 m, which Scubapro lists as 490 to 492 ft. That is well beyond recreational no-decompression limits, so the pressure rating is not a limiting factor for normal sport diving. Watertight integrity comes from double O-ring seals, and an over-pressure valve vents any battery off-gassing from the compartment.

Scubapro describes it as a compact recreational dive light, with 250 lumens, 2700 lux at 1 m and a tight 12 degree beam. The 4500 K color temperature renders colors neutrally underwater. Because burn time is up to 1 hour at full power, many divers also carry it as a compact travel or backup light.