Description

Karken Hydra 18000 WRGBU Five Colors Multi-Purposes Light

The Hydra 18000 is built for situations where you need more — more throw, more coverage, more headroom. At standard settings, constant output is 15,000 lumens at 5600K with CRI 90. Push the dial to 120% (Turbo) and you get the full 18,000 lumens — that’s the sustained working output at that setting, not a peak claim. Burn time at Turbo is shorter, which is the trade-off for the extra output. The 120° beam angle keeps things wide without the soft falloff edges that plague cheaper optics.

CRI 90 at 5600K means that 18,000 lumens is genuinely useful light — not just bright. Reds render accurately, highlights don’t blow out with a color shift, and your footage looks right without heavy grading. At this output level, poor color rendering compounds fast: every overexposed highlight carries the wrong hue. This light doesn’t do that.

Like the 12K, the Hydra 18000 runs a full WRGBU LED array — White, Red, Green, Blue, and UV — with the same mode set: White, Red, Green, Blue, UV, Preset, Disco Mode (automatic RGB cycling), and Burst. If you’re doing fluorescence photography or behaviour work where white light isn’t appropriate, the colour channels are genuine tools, not spec-sheet padding.

Burst mode — fiber-optic triggered: Sync via fiber optic cable to your camera’s built-in flash and the Hydra 18000 fires a quick, bright pulse timed to your shutter. Recycle is fast. The difference from a dedicated strobe is flash duration — a xenon strobe fires in microseconds, which is what fully freezes motion. Burst fires longer than that, so very fast-moving subjects won’t be frozen as sharply. Note: burst mode output is the same 18,000 lumens as Turbo — it’s triggered by your shutter, not a step up in brightness. For macro work on slower subjects it gives a real brightness spike that continuous light cannot replicate.

Three-button control makes mode switching straightforward underwater with gloves on, and the battery indicator gives you a real read on remaining charge before you commit to another dive profile. Rated to 100m/330ft.

This is the light for serious video shooters, technical divers who spend time in low-visibility conditions, or photographers who’ve used a smaller Hydra and found themselves wishing for more output on wide shots. The jump from 12K to 18000 is meaningful in practice — you’ll see it in how your footage handles ambient light in the 10–20m range where most diving actually happens.

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