These are similar bulbs that virtually interchange, but have differentapplications. The 1895 bulb (left) has a round globe designed forinstrument panels. The longer 1893 bulb (right) is often installed inplace of the 1895 in error. But the longer globe may come in contactwith the blue plastic bulb cover, causing the plastic to melt or burn.Both lamps are two-candlepower. It is our wish someone would market afour-candlepower version of the 1895 lamp for brighter instruments.