The brightness and type of bulb determines the efficiency at which phosphorescent material charges. Efficient bulbs not only charge faster, but can obtain a brighter level of glow. For example, a black light shining on a glow surface for 30 seconds will cause that surface to be 10x brighter than a flashlight on it for 6 hours. Here is a simple list of bulbs in order from least to most efficient:
A frequently asked question is "How long does it take to get a full charge?" The easy answer is that the rings should be at their maximum charge from any light source in 20 minutes. However, that is a useless answer. "Maximum Charge" will change depending on the light source. A black light on for seconds can cause our products to glow brighter than an incandescent bulb lit for 10 hours. Of course, the speed of charge is also determined by the light source. A "full charge" is also a hard statement. Under black light, most pigments will get to 80% of their charge within 30 seconds, 90% over 60 seconds, 95% over about 5 minutes, 100% in about 20 minutes. This is further complicated by the size of the pigment. Larger pigments can glow brighter and longer, but charge slower.
In conclusion, use a black light if possible.
If white light is needed use CFL "Daylight" bulbs.
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