halocline
Contributor
I was pretty unimpressed by the focus when I saw it in use for a week recently in Mexico, which, granted, is clear water. My LM 20W LED was much brighter and a better color. But....it's true that the LM LED light head is not great for signaling. The overall spread is good, but it lacks that center hot spot. I have heard from someone whose opinion I trust that the UWLD lights are similar, even the newest supposedly tighter beam.
The focus has a square, yellowish hot spot, and it is very well defined, but I doubt that it would cut very well in bad vis. There was also a big blue 4800 in our 3 person team for a few days, and that light actually did pretty well comparatively. But it only has a burn time of 2 hours and it does get dimmer (not very noticeably) towards the end of the dive.
The best in terms of signaling that I have ever used, by far, was my old LM21W HID. I wish that thing still worked. If you could find one at a low price, so that you're not crushed when either the bulb breaks or the ballast goes belly up, I would go for that. The LED lights are overall brighter, smaller, and have better burn times, and are more reliable. But the focal point and character of the HID is still the best IMO.
The focus has a square, yellowish hot spot, and it is very well defined, but I doubt that it would cut very well in bad vis. There was also a big blue 4800 in our 3 person team for a few days, and that light actually did pretty well comparatively. But it only has a burn time of 2 hours and it does get dimmer (not very noticeably) towards the end of the dive.
The best in terms of signaling that I have ever used, by far, was my old LM21W HID. I wish that thing still worked. If you could find one at a low price, so that you're not crushed when either the bulb breaks or the ballast goes belly up, I would go for that. The LED lights are overall brighter, smaller, and have better burn times, and are more reliable. But the focal point and character of the HID is still the best IMO.