This is a useful 12V light in a very common form factor that seems to have become a standard. The bizarre name "purification light" actually makes it easier to find these online. The same style of light is referred to as a grill fitting by CPC (A prominent UK supplier).
The light comes with a double sided foam adhesive strip and also the more traditional concealed metal clips for attachment to a surface. The foam strip may be useful for vehicle use, but the clips would be preferable for wall or ceiling mounting indoors.
The circuitry is refreshingly simple - just LEDs and resistors, but it should be noted that running this directly from a fully charged SLA/Lead-acid battery will cause much higher LED current than normal. I tested it at various voltages and got the following results:-
8V - 32mA - 0.26W
9V - 195mA - 1.75W
10V - 378mA - 3.78W
11V - 595mA - 6.55W
12V - 804mA - 9.65W
13V - 1012mA - 13.16W
14V - 1237mA - 17.32W
If using for long periods of time on a lead-acid battery supply that may float to 14V during charge, I'd recommend at least two diodes in series to drop the voltage slightly. Like 1N4001 series diodes.
This light came from an Aliexpress seller. Note that many of their other items at unusually low prices are salvaged or factory rejects. This item was ordered along with several packs of LED filaments that came pre-broken, and also some small motor assemblies that had clearly been removed from equipment, and of which about half were faulty - including really obvious things like missing shafts.
https://www.aliexpress.com/item/1005001804922038.html
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