A light head for use in relining a pipe, the light head may include a proximal end cap, a distal end cap, at least one body, at least one LED-plate, and at least one spacer. The proximal end cap may include a fluid inlet. The body may be arranged between the proximal end cap and the distal end cap. The body may include a longitudinal passage extending from the proximal end cap to the center of the body. At least one lateral channel may extend from the longitudinal passage to an outlet. The LED-plate may include at least one light emitting diode. The spacer may be disposed between the LED-plate and the body. The longitudinal passage may be configured to receive fluid from the inlet such that the fluid hits the LED-plate.