We've sold our last shipment of these bulbs, and the manufacturer says there will be no more
We REALLY, REALLY recommend the halogen DYY/EGH bulb - it's better and now costs less.
for information only: DAY/DAK bulb. 500 Watts, 120 volts. For most Sawyers and many other slide projectors.
About the color on the top of the bulb: may be black, blue, gold or clear. This was just to keep light from shining out the top of some old projectors, and manufacturers have used different colors and materials. It doesn't really matter.