PL9 Fluorescent Black Light
PL9 black light blue fluorescent bulbs are the typical lamp used for several types of effects including the most common one which are black light posters and effects. The bulb has a special deep purple appearance when unlit. Using these can be fun in many types of applications where you really want to make a stunning effect. - PL9 black light blue fluorescent. - Black light effects and stage effects. - 9 watts.