Well i recently recieved a 25g cube tank its 18x18x18 and im kinda new to the sw game and i wanted to buy a good light for it something simple not to complex i see these lights that clamp on but i dont no much about em really if anyone could help me out or link me a sight i would appreciate it so much and i want to go reef on it im not that big of a noob i do run a 55g tank but its just aggressive fish simple stuff i heard lighting for reef is a little touchy and i want clams and what not witch i also heard are needing some good lighting ty for your time hope to hear from someone