There are two different lamps provided with our Vernier Circuit Board 2 (VCB2). The Vernier Circuit Board 2 comes with 5 cylindrical bulbs (#48), 2.0 V, 60 mA. It also comes with 5 round bulbs, (#50), 7.5 V, 220 mA.
These two types of light bulbs are the same bulbs that came with our original Vernier Circuit Board (VCB, discontinued).

We sell replacement lamps, Replacement Lamps for Vernier Circuit Board (VCB-BULB), which includes 10 of each type of light bulb.

The #50 lamp is commonly available online. We have found the following sources:
     http://www.1000bulbs.com
     http://www.amazon.com
     http://www.bulbtown.com

The #48 bulb is not commonly available and is therefore typically more expensive to purchase from other sources.