Led lighting device and method for assembling led lighting device

A method for assembling an LED lighting device comprising:

• providing a frame for the LED lighting device, the frame comprising at least one elongated sheet of frame material bent across at its width at at least one location to form a shape,
• wherein a first end of the sheet of frame material meets a second end of the sheet of frame material at a seem,
• wherein the first end of the sheet of frame material approaches the seem at an angle relative to the second end of the sheet of frame material;
• wherein the frame has at least one protrusion extending from an inner surface defined by the sheet of frame material towards an inside of the shape adjacent a front or back edge of the shape;
• providing a sheet of joint material having a first thickness;
• providing a groove in the sheet of joint material, the groove defining a reduced second thickness and dividing a first segment of the sheet of joint material and a second segment of the sheet of joint material;
• bending the sheet of joint material at the groove and positioning the first segment adjacent the first end of the sheet of frame material and positioning the second segment adjacent the second end of the sheet of frame material;
• and
• securing the sheet of joint material on each of the first and second ends of the sheet of frame material with a plurality of fasteners,
• wherein each of the plurality of fasteners pierces the protrusion of the frame and retains a corresponding segment of the first segment and the second segment relative to the protrusion.