Automatic ON-OFF. When installed as per the User Manual, this LED safe lighting set will start to work automatically when you open the door of your gun safe/locker/closet and stop working automatically when you close the door.,Easy to Install. The 90-degree-backing design, door-control switch with separate sensor and various mounting hardware included make it easy to work out the best layout and install those 12” LED light bars along the inside corners of your gun safe/locker/closet/cabinets/pantry/hutch.,Slim Low Profile Design. Very slim cables and plug-in connectors. The LED light bars themselves are only 0.4” x 0.4”. It’s easy to hide them inside corners of your gun safe/locker/closet/cabinets to make them invisible.,DIY & Extendable Design. 2-way splitter, extension cables included for different layouts. 2 pcs extra add-on 12” LED light bars can be added into this safe lighting kit.,Bright Light with Electrical Power. Compared with those battery-powered lights, this safe LED lighting kit is much more bright (215 lumen/12”)and it will be a permanent installation without any worry about changing batteries.