Various aspects and embodiments of under-hood luminaires are described. In one example, an under-hood luminaire includes a luminaire frame assembly. The luminaire frame assembly includes support braces and a number of cross members secured to the support braces in a spaced-apart configuration. The cross members include mounting surfaces, and light strips are secured to the mounting surfaces. The luminaire also includes a contraction hook assembly that can be used to secure the under-hood luminaire to the hood of an automobile. The luminaire can be relied upon to uniformly illuminate the engine compartment of the automobile, helping to eliminate lost productivity and frustration for mechanics.