JC10418B curved led light bar are new released in 2015, they are popular in APPEX in Las Vegas. They have big reflector, longer distance and brighter.
For the time being, you have three choice about the length: 18", 23", 50".

For other new led light bar, JC03218A series double row 3W led light bar
                                           JC10118B series single row 10W led light bar with big reflector