No installation. Just plug in. Super Fast delivery. Arrived no issues. Was tossing up between the TT-DL19 and TT-DL22 based on sturdier aluminium construct.. this one is plastic. Still ok for 2020 prices... but would with so many options I might get the TT-DL22 as a second light as its only priced a bit more.
Definitely a winner on functionality with 2 swivel points (on base and head lamp) and abiility to move front and back. Lets hope it has durability. My last cheap non specific brand LED died after 2 years.