For macro and close-up photography, electronic flash has always been the choice of illumination for most photographers, especially when working in low ambient light. With the advances in lighting however, LED lights provide an alternative source of illumination with certain advantages not found with electronic flash.
When using electronic flash, reflections from various surfaces is difficult to predict and unless used with light modifiers, the cast shadows are strong and usually undesirable. Very often, the photo indicates that a harsh source of light has been used. LED lights, though not a replacement for electronic flash (as it does not have the power or the action-stopping property of electronic flash) can often come in very handy and are also easier to use.