Best Lamp for planted  aquariums from   19.69 '' to 31.5 " (50 to 80 cm.)
 
GNC Heaven is a multispectrum LED ceiling light developed specifically for aquariums with aquatic plants that enables color-enhancing growth in even the most difficult plants.
Heaven S, Heaven M, and Heaven L consume only 18, 35, and 55 watts, respectively, but have luminous efficacies of 2900, 5600, and 8800 lumens;
light intensity can be adjusted by purchasing the optional Single Dimmer or Powermoon, the latter of which will adjust both intensity and sunrise and sunset times.