LED tube light housings configured to control and orient the lateral position of inserted LEDs on a wiring harness. An LED tube light housing includes a first end, a second end, an inner surface, and an outer surface. First and second sections are generally formed inside the housing. The first section is configured in the form of a cavity for providing a vertical orientation of one or more LEDs. At least the top of the first section, e.g., the cavity, is transparent, translucent, or the like, to permit light emitted from LEDs contained therein to pass therethrough. The remaining portion of the housing may be transparent, translucent, opaque, or a combination thereof. The second section is configured to contain therein electrical components of the wiring harness. No printed circuit board portions are included in the wiring harness.