Decolight duo is a unique lighting lamp for aquaria equipped with two independent ecolight11w modulesr decolight duo marine is equipped with ecolight marine 11w 10000k module optimum for development of coral reef and ecolightactinic11w 20000k module highlighting the natural colours and providing the effect of fluorescence of coralsr decolight duo lamps are ideal for any small and medium size tanks including the currently so popular nanoaquariar their additional advantages are compact size