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<blockquote data-quote="WayneF" data-source="post: 488726" data-attributes="member: 12496">The B&amp;H page says these lamps are BCA bulbs.&nbsp; BCA are special photoflood bulbs for photography, controlled color (4800K, near daylight), but have a short life, about 12 hours.&nbsp; They are sort of low voltage bulbs operated at regular voltage to make them bright, but short lived.&nbsp; You don't turn them on except for during actual use.For example, see <a href="http://www.bhphotovideo.com/c/product/825772-REG/Sylvania_11655_BCA_Lamp_250W.html" target="_blank">Sylvania / Osram BCA Lamp (250W/120V) 11655 B&amp;H Photo Video</a>There are others, like ECA, 3200K&nbsp; (incandescent) and 20 hours life.Or, you can use any type of bulb that suits you.&nbsp; Regular bulbs will have regular life.You really don't need bright.&nbsp;&nbsp; Jewelry is not going to move, so you can use any slow shutter speed you wish.&nbsp; With a slow shutter speed, it is good practice to use the self timer, to get your finger off of the shutter button a couple of seconds before shutter, to let your fingers vibrations fade away.&nbsp; Or a shutter release cord.</blockquote>

[QUOTE="WayneF, post: 488726, member: 12496"] The B&H page says these lamps are BCA bulbs. BCA are special photoflood bulbs for photography, controlled color (4800K, near daylight), but have a short life, about 12 hours. They are sort of low voltage bulbs operated at regular voltage to make them bright, but short lived. You don't turn them on except for during actual use. For example, see [URL="http://www.bhphotovideo.com/c/product/825772-REG/Sylvania_11655_BCA_Lamp_250W.html"]Sylvania / Osram BCA Lamp (250W/120V) 11655 B&H Photo Video[/URL] There are others, like ECA, 3200K (incandescent) and 20 hours life. Or, you can use any type of bulb that suits you. Regular bulbs will have regular life. You really don't need bright. Jewelry is not going to move, so you can use any slow shutter speed you wish. With a slow shutter speed, it is good practice to use the self timer, to get your finger off of the shutter button a couple of seconds before shutter, to let your fingers vibrations fade away. Or a shutter release cord. [/QUOTE]

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