" Eight-watt lamps are ideal for applications requiring a wider area of illumination than a 6-watt lamp All lamps feature aluminum construction and scratch-resistant finish. Lightweight enough to fit comfortably in the hand. The twin lamp models with two tubes provide even higher intensity. The EL Series features up to nine different lamp configurations. The basic models have one single wavelength tube and one white light tube. The twin models offer the intensity of two single wavelength tubes. Both the basic and the twin models are available in longwave (Model UVL), mid-range (Model UVM), and shortwave (Model UVS). When more versatility is required, the 2UV models use two tubes of different wavelengths and give the option of longwave and shortwave (Model UVLS), or longwave and mid-range (Model UVLM). The 3UV model offers the maximum versatility by using three tubes of different wavelengths, allowing the choice of longwave, mid-range, or shortwave. "