It depends on the color of the jigs you are trying to "recharge" The white light of a camera flash is a good option because it will contain many colors in the visible, UV, and IR spectrum (most likely) The luminescence of the jig is dependent on a few things but the one critical aspect is that you must use light of shorter wavelength than the color which is being emitted from the glowing jig itself in order to "recharge" it. It is the higher energy light (shorter wavelength) which photo-excites the electrons in the paint into a higher energy state and creates the luminescence. As the electrons try and relax back to their initial state after being excited they must emit a photon of light in order to shed the excess energy they gained. Exciting VERY high up (in the UV end of the spectrum) will provide longer luminesence on average because more than one transition may be invoked, thus lengthening the time of the "glow" because many relaxations must take place. In short I would suggest a UV source if at all possible. This would be anything in the blue and higher. (for example red light will only luminesce in the red and IR, green will cause luminescence for red, orange, yellows and greens less than the exciting wavelength and so on.) Many of the new LEDs that are "white" actually have a strong UV component and would thus be suitable. Most of them operate by means of a UV LED (single wavelength) which is coated with a substance which contains millions of quantum dots that converts the light to many wavelengths (thus giving you white light)
