A good general rule is never use more light sources than you need (double shadows
) Fill can be supplied by white card or mirrors. Reflective objects are the most tricky.
Unless youâ€™re going for dramatic theatrical lighting, aim for the traditional 19th century softness of a large studio window.
Small table-top objects such as jewellery and watches (particularly on black velvet) will tolerate more than one light source ... ooh, it all takes me back 30 years