I have a similar clip-on 9v single LED mini-flashlight on the night table. This one points up against a round wax "candle" (also a flickering LED device) which diffuses the light. These are great for running down used 9v batteries which come out of smoke detectors, DMMs etc. but still lots left in them (typically still 7-8v).Interesting "lantern" 💡🔋
Official Website -- Pak-Lite LED Flashlights snap to the top of a 9v Battery and provide light for up to 1,200 hours.www.9voltlight.com
Another one nearby has six LEDs with switch to select either two or six on at a time.
side note: $20 for one of these (Lithium battery aside)? I've seen similar ones for a few dollars each, originally 3 pack for $4 in local stores.