Hello, I bought a bunch of [URL="http://www.homedepot.com/Lighting-Fans-Indoor-Lighting-Indoor-Ceiling-Lighting-Recessed-Lighting-Trims/h_d1/N-5yc1vZ25ecodZbvncZ1z115g2/R-202823462/h_d2/ProductDisplay?catalogId=10053&langId=-1&storeId=10051#.UNHuTKyEhHB"]these LED lights[/URL] and they work really nicely. I used the [URL="http://www.homedepot.com/Electrical-Electrical-Boxes-Conduit-Fittings-Boxes-Brackets/h_d1/N-5yc1vZbohnZ1z11eryZ1z11evgZ1z116saZ1z1166eZ1z116cyZ1z116n4/R-100114498/h_d2/ProductDisplay?catalogId=10053&langId=-1&storeId=10051#.UNHxH6yEhHA"]new work boxes with metal bar[/URL] as the [URL="http://www.homedepot.com/Electrical-Electrical-Boxes-Conduit-Fittings-Boxes-Brackets/h_d1/N-5yc1vZbohnZ1z11eryZ1z11evgZ1z116saZ1z1166eZ1z116cyZ1z116n4/R-100404072/h_d2/ProductDisplay?catalogId=10053&langId=-1&storeId=10051#.UNHxQayEhHA"]old work boxes with wings[/URL] didn't have enough room in them. I plan on working on a ceiling without attic access. is there a way to use the new work boxes, or is there a bigger old work box out there? If not, any other suggestions? I plan on using 14-2 wiring and only have one cable enter and one exit each box, but it is still pretty tight with the old work boxes. Thanks P.S. is that a grounding screw on the old work box? I don't think the ones sold locally have that.

I am planning to make a DVD case with LEDs in it. I want to attach 18 LEDs to a 9v battery. I am not experienced in circuits with LEDs and dont know how many resistors or what sizes to use. Any ideas?