They're really not. They're quite dangerous. I flirted with the "T12" ecosystem for a bit and the designs are marginal to say the least. From a mechanical desig

They're really not. They're quite dangerous. I flirted with the "T12" ecosystem for a bit and the designs are marginal to say the least. From a mechanical design perspective it's not uncommon for the mount to short the supply out which will blow the MOSFET in the unit to bits. Secondarily, if the power supply browns out, the devices tend not to fail safe and will quite happily give you a bright orange glowing fire hazard for a tip. Not only that some of the Quicko ones have firmware crash bugs which can trigger a reset while the MOSFET is turned on. Woosh.