Recently I learned about a company named BulbMan. They have offices all over the United States now. A pleasant lady in Miami provided me an introduction to their company office in that city, and subsequently I spoke with Jerry Roth, President. I recently visited their booth at PMA trade show in Las Vegas. As you can see, their booth was very popular.
People seem to like their reasonable prices.
Always use a paper or cloth to hold the lamp. Do not use the bulbs too long, the color temperature will decline and your pictures will not turn out properly colored. Bulbs can explode unexpectedly, so it is best to have a screen on the front of your lights. Some museums require that your lamps have a glass shield. But in 27 years of using tungsten lamps, they have exploreded only twice that I can remember.