A lighting grid is a series of metal rods or tubes that are used to hold and shape a softbox or other light modifier. The grid is placed over the front of the softbox, and the size and spacing of the grid cells determines how much light is transmitted and in what pattern. Grids are often used to control the spread of light and to create more directional lighting, which is useful for separating the subject from the background or for creating specific lighting effects.

Light temperature, or colour temperature, refers to the hue of a light source and is measured in degrees Kelvin (K). Different light sources have different colour temperatures, and the colour temperature of a light source can have a significant impact on the overall look and feel of a photograph.

For example, light sources with a low colour temperature (e.g. 2500-3000K) tend to have a warm, orange hue and are often used to create a cosy, intimate atmosphere. On the other hand, light sources with a high colour temperature (e.g. 5000-6500K) tend to have a cool, blue hue and are often used to create a crisp, clinical look.

By using grids and adjusting the colour temperature of the light sources, photographers can fine-tune the lighting in their photographs to create the desired effect.