The Plant Light House™ is a compact growth chamber ideal for Wisconsin Fast Plants® and other plants up to 20" tall. The chamber accommodates up to 64 Fast Plants®. The Plant Light House™ features a height-adjustable light fixture with a compact, fluorescent, high-intensity bulb (27 to 39 W) and an adapter (both included). The unit is easy to assemble and disassemble for compact storage. Providing versatility, the Plant Light House™ can easily be converted to a butterfly box with the addition of the Optional Butterfly Screen (item# 158994A) that adheres to the front of the box. Ideal for individual or classroom science projects. Assembled dimensions, 16 1/2 × 16 1/2 × 20 1/2" H. Replacement Bulb (without adapter) sold separately.