The Big Blue TL4800P was a ScubaLab Testers Choice during the 2018 dive light test. Learn what testers liked about this light in this video review. See the full ScubaLab dive light review here.

I’m Roger Roy, the ScubaLab director. We tested the Big Blue TL4800P dive light. Extremely powerful with a tight, useful beam, it was our Testers Choice for large dive lights.

We tested the light’s output on a full and partially discharged battery at Wilger Testing Company in Sarasota, Florida. It was tested using an integrating sphere in order to measure the light’s total output in lumens, without regard to its beam angle.

We also tested it during a night dive at Devil’s Den Spring in Williston, Florida with a team of test divers who scored it in 8 categories including ease of use, light output and beam size and shape.

Test Diver comments about the TL4800P ranged from “great beam to “holy crap is this bright,” and no wonder. Its quadruple-LED light head delivers a tight, 10-degree beam with more illumination in our lab test than any other dive light. In fact, high power can be a little too much; fortunately, you can step it down 50%, 25% and even 10% with the press of the push-button switch.

There’s also an SOS flash mode. With four rechargeable Li-ions and an aluminum body that’s 6 inches long, it’s a little chunky. But it took very good ergonomic scores in our test using the lantern handle. Although there were some gripes that the handle puts the lighted switch on the bottom, out of sight.

With oodles of well-controlled power, the TL4800P is our Testers Choice for large dive lights.