Kindly notice :DC12V 6-10 meters has a voltage drop, the lamp must be powered by manner of 2 ends; DC24V 11-20 meters has a voltage drop, and calls for to be powered by way of means of 2 ends. Led strip must be remove darkness from after opened up completely, don't light up in a roll, in any other case it is going to soften and don't work, which will trigger security problem:This is the newest double-sided luminous low-voltage COB neon light, with a large luminous surface, emitting light on both the entrance and side, no dark areas, pleasant mild transmission, and nice flexibility, correct for engineering decoration. Input voltage: DC12V/DC24V Color: White soft (6000-6500K)/Natural white (4000-4500K)/Warm white (3000-3500K) Lamp bead: COB Number of LED beads: 320leds/m Neon mild outer dimensions: W5-6mm x H11-12mm Waterproof rating: IP65/IP67 Cutting distance: 5CM can be lower (DC24V), 2 can be minimize (DC12V) 12V 0/1m desire 12V 1A calories shipping 12V 2m/3m need 12V 2A power delivery 12V 4m/5m favor 12V 3A strength delivery 12V 6m/7m want 2pcs 12V 2A power supply 12V 8m/9m/10m want 2pcs 12V 3A energy delivery 24V 0/1m/2m/3m desire 24V 1A energy delivery 24V 4m/5m/6m/7m choose 24V 2A power shipping 24V 8m/9m/10m favor 24V 3A strength delivery 24V 11m-15m need 2pcs 24V 2A strength transport 24V 16m-20m choose 2pcs 24V 3A strength supplyPackage Includes:1x COB Neon Strip (no energy supply)