Just added some Bias lighting to the back of my 940C. The set has a nice little (~1/4") shelf on the back where I applied the LED light strip to. With the black levels on this set, Bias light isn't really necessary, but I had it on my 850B so why not? Does help a little with eye strain since the 940C can melt your retinas if you have the brightness setting up in a dark room.
Rec Room: LG 77C8/Denon X4300/Oppo UDP203/Klipsch RP280F, RP450C, RP140 Atmos, RP150M, R14M/Martin Logan Dynamo1000/PS4 Pro
Living Room: Samsung 82Q90R/Yamaha A1050/Sony UBP-X800/Definitive BP9040, A90 Atmos, BP6/SVS SB2000/Xbox One X