The bench-top UV transilluminator series offers the researcher uniform and intense sources of ultraviolet light (radiation) with a compact footprint. Their special design emits either one or dual intensity excitation UV wavelengths for back-illumination of transparent fluorescent materials. 254nm, 312nm, 365nm, 254 & 365nm, and 254 & 312nm modes are available for different applications. There are two choices of filter size viewing dimensions, 26 x 21cm and 21 x 21cm for different user requirements. The 365nm mode is offered for easily viewing gels under long wave for extended periods of time avoiding photo nicking damage. The 254nnm mode is used to irradiate samples. The 312nm mode is suggested for general gel operating. The single wavelength modes have a high intensity / low intensity switch equipped. All bench-top Transilluminator modes are compact, lightweight and economical.