Adding my experience with Wurkkos lights. I have currently three Wurkkos DL08 (bought three more for family) and one DL02 (one more is on the way). They are fairly nice lights for the price, have been diving with them over the last 5 months, so they have around 30 dives without any water leakage issues (I greese the o-rigns regularly). I usually have DL08 as primary and DL02 as backup.
Wurkkos DL08 (my preferred light as it combines spot and flood, red is a nice addition, UV is weak). I use it quite often as video light as it renders nice colours (advertised CRI90) with my action cam. See here during night a dive switch from spot to flood:
Additionally, the button and switch is easy to operate with one hand and without looking. Have not noticed any step downs in terms of power underwater (good, Sofirn SD06 steps does after few minutes I read), but it also means that if you use the flood on turbo, it will last well under 1 hour at that power using the supplied batteries. Like also the continuous power adjustments and lock function (usually lock it on red/uv just in case).
To improve, I would probably remove red and UW as the additional functionality might be affecting reliability. One of my DL08 started glitching on last dive vacation and at one point during a dive, I could not turn it off for 10 minutes while it was blinking at high power and unresponsive to switch and button. There is no water damage and it seems to be driver related malfunction. See video here:
This was roughly 5 months after purchasing the light from official Wurkkos store on Lazada (Vietnamese equivalent of eBay, warranty for 6 months), so I had the opportunity to test the responsiveness of customer support and warranty handling. This is where my good experience ended. Following instructions on official web, I sent an email to their foxmail (included above video recording) and received no response. Then I tried to contact them via Lazada and they responded after few days, but in the end told me that it is close to 6 months and that they will not to anything about it after admitting it seems like driver malfunction. Arguing that warranty is 6 months did not help. So here is answer to
@Mr.Ying.
Now, I understand it is not an expensive light, but still would expect
@Wurkkos Diving Light to have better responsiveness and customer service.
Wurkkos DL02 is simple spot light, but noticeably more powerful at high mode (advertised 3k lumen), comes in handy when trying to find something farther away. The toggle is easy to use as well, but as there is no locking function, so you can accidentally turn it on as someone already mentioned in this thread.
To improve, I would add lock function and consider option with high CRI led to improve colour rendering.