Blue light transilluminators are often used as an alternative to UV transilluminators when users wish to use ‘safe dyes’ instead of ethidium bromide. A blue light transilluminator is a ‘safe’ light source, in that the user is not exposed to harmful UV radiation and samples are free from photonicking. UltraBright-LED transilluminator uses side mounted 470 nm LED arrays for illumination and can be used with gels up to 20×16 cm.