The westcott 115cm round halo is built around an umbrella frame rather than the traditional softbox construction meaning that it can be used without the need for an adapter ring it just utilises the umbrella bracket on the flash head setting up and taking down is quick and easy using the hook and loop tape opening at the rear of the box and can be used with lights up to a maximum of 500w the westcott 115cm round halo has been designed for lights with rear panel controls for those with side