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 .

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.