https://stream.echo6.co/videos/watch/779cec22-71ac-4b4f-9c18-b8517dc1d3c7 Although seemingly used in many Chinese factories, this unit is not compliant with electrical standards in "safer" countries. It's described as an explosion proof tester - but that doesn't mean it can be used in high risk explosive environments. It just means it has a series load option that prevents faulty devices exploding, by limiting the current through them. As with all these Chinese factory test boxes, they take a rather slack attitude to electrical safety, and the lack of polarity, exposed bulb threads and misuse of speaker connectors for 220V (China's supply voltage) means that the unit poses a shock risk to the unwary. Still better than the two nails in a bench I've seen being used to test bulbs in some factory videos. I suppose that one of the screw-in ceramic vivarium heaters could be used as a safety load too if the tungsten bulb it's designed for is hard to get. These units are sold on AliExpress as LED bulb testers. But I really can't recommend them for safety reasons. If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:- https://www.bigclive.com/coffee.htm This also keeps the channel independent of YouTube's algorithm quirks, allowing it to be a bit more dangerous and naughty. #ElectronicsCreators Wed, 15 Apr 2026 09:26:58 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://stream.echo6.co https://stream.echo6.co/client/assets/images/icons/icon-512x512.png https://stream.echo6.co/videos/watch/779cec22-71ac-4b4f-9c18-b8517dc1d3c7 All rights reserved, unless otherwise specified in the terms specified at https://stream.echo6.co/about and potential licenses granted by each content's rightholder.