Plug & Play the Hamilton Cebu Sun Systems right out of the box. They include your choice of bulbs in either 175, 250 or 400 watt, in either 10K, 14K or 20K bulb coloration, electronic ballast(s), and fixture. All Cebu Sun units also include 4 - T5 Real Actinic Blue 420nm High Output Fluorescent bulbs. If you have corals, clams, or light intensive inverts, then the Hamilton Cebu Sun Systems are a great choice. Free Shipping is included on all Hamilton Cebu Sun Systems. Should you have any questions about which unit is right for you, please contact us.