Save money with a less expensive, safer option than spectrum tubes. Viewed through a spectroscope, the 6 compact fluorescent 60-W bulbs produce spectral lines spanning the visible light spectrum. Unlike spectrum tubes, these lights generate very little heat-no need of intermittent turnoff for cooling and less risk of a burn.
Set includes 1 bulb each of red, orange, yellow, green, blue, and black. Each lasts up to 8,000 hours, guaranteeing years of use.
