TrustFireDF50 Diving Camera Photography Flashlight Diving Torch (DF50)

I have 2 of these lights on a camera rig, with around 50 dives on them now.They're great lights, and for a good price. They have plenty of power for daytime videography, and at night they're even better. Video lights don't have a hot spot, so they illuminate the area very naturally. I don't find my self reaching for a dive torch unless I need more reach at night (e.g. when you see something move in the distance). If you're doing still photography, you'd be better off with strobes, but these still work just fine, and are far cheaper than a strobe set up.Durability is great. I soak them, charge batteries and grease O rings after every dive day. The ball mount appears to be hardened carbon steel, which isn't great as they're corroding where they meet the aluminum housing. I installed mine with locktite as a slipping ball mount is a real pain, but with the corrosion they're never coming out again anyway. I don't even want to disturb them to clean the corrosion, they're installed, they don't slip, they're staying there. Complaints about stripped ball mount sockets are likely due to over torque issues. Take it easy with the wrench and use some locktite if you're concerned about them backing out (as I was).The mode/power button works well. It remembers the last mode you were on, and turns on the that mode when next activated. It also flashes intermittently to indicate battery level (green, yellow, red, flashing red) which is handy as charging these batteries is a real hassle.It has a lock mode to prevent accidental activation for some reason, the button is so firm and requires a long press to turn on anyway, so its not necessary. If you think the light is dead, you might have activated it accidently, just double click the power button to turn lock mode on and off.

非常に明るく充電式で使い易いライト。操作ボタンの問題は、自己解決。重いのは残念だが、仕様上仕方ない。

I purchased two lights in August and September 2021. I have used one of them no more than 5 times, the other I have used only once. I then left them in storage for two years as I had no time to dive at all. They were stored in the protective cases they came with, with batteries disconnected.I tried to use them last weekend (January 2024) and none of them switched on. I have charged the batteries (one was continuous green when connected, and the other one was blinking as charging until it got continuous green too.)I have sent an email to Trustfire, will wait and see what they say. When the light work they give enormous amount of light (I film cave diving movies so no amount of light is too much). I really wish I can make them work again.

This puts out a lot of light. I used it with my GoPro Hero 11 on a handful of dives in Bonaire. It is a very wide angle uniform flood. It pretty much fills up your entire field of view, turning night into day (sure to annoy other divers), but it matches up well with the GoPro's wide field of view. During the day it was giving me really nice color to about five or six feet.The UV light was a pleasant surprise as well. I had heard about UV light diving. When I accidently cycled though that setting at night, the reef lit up like a Jackson Pollock painting. I was a bit surprised as I though that UV light diving required a mask filter as well but apparrently there two different wavelengths that are typically found on lights. This wavelength does not require the mask filter. Hopefully there is not a massive amount of UV light being reflected from water particles back into the diver's eyes...Quite impressed with build quality. Very sold.

There are many things we like about these lights, which explains why we've bought 7 of them. The fact that only 2 remain in operation explains why we won't buy any more.The good: Nice size for a dive continuous light, good battery life, usable brightness. The 395 nm UV light is great for nighttime corals and anemones. I really love these lights until they flood.The bad: Many of these are shipped with a loose lens retaining ring. We couldn't figure out how out lights kept flooding until the ring (and lens) on a brand-new one fell off on the boat. That's one of the 2 that's survived, probably because we tightened the ring before the first dive. Honestly, these things flood like the banks of the Nile. None has lasted longer than a couple of weeks of diving (Cozumel, max depth 164 feet/50 meters, max duration 102 minutes, max dives/week 8).The minor: The cases seem as if they might be useful but the latches are very poorly made. At least one latch on every case broke within a week. Some arrived broken. Others broke in luggage (containing other fragile items that were undamaged). Don't buy these for the case.The ball joint has nothing to keep it from rotating, so adjusting your light can loosen the ball joint's connection to it. Many other manufacturers use various means to prevent this.