From the maker's website:

LSC-160 Lamp

This combination lamp gives you a choice between a 100W incandescent light and/or a 22W fluorescent light to fit the job. The sturdy camp attaches to most flat surfaces. The arm reach is 45". It is available in black (LSC-160-BK), white (LSC-160-WH), or ivory (LSC-160-IV) for a price of $99.95.

Replacement Bulbs

The 22W fluorescent bulbs (LT-22) are available for $9.95, 100W halogen bulbs (LT-100-T) are $4.95.