The Dual 600W 240V HPS digital cool tube system comes with dual cool tube, dual 600W Lumatek ballast and 2 standard HPS bulbs. This system offers maximum cooling while providing 1200 watts of light. This makes happy plants. Cool Tubes offer the most compact and effective way to get bright light over, or in, your growing area. Due to their streamlined design, cooling airflow can move unimpeded, keeping growing area temperatures lower and allowing you to position your lamp very close to your plants. These lamps are also excellent hanging vertically down into the plant canopy or for enclosed growth chambers. This is ideal for use over 4 foot X 8 foot flood table. An exclusive adjustable socket rings allow for various positioning of the bulbs anywhere in the tube. Included reflector can be removed to use the tube vertically. This system is compatible with all major lamp brands. The 600W Dual Ballast is the brightest 600W ballast on the market and incorporates two ballasts into one enclosure. Lumatek ballasts produce more lumens while using less energy and are capable of powering both HPS and MH lamps. The efficiency, versatility, and reliability of Lumatek ballasts has made them the ideal solution for today's indoor gardening enthusiasts. The external fuse system protects against surges. Up to 20% more lumens than comparable magnetic ballasts. Internally RF shielded and is the best on the market. Is completely silent so you can leave the humming and buzzing behind. Has the best warranty in the industry - 3 years full plus 2 years prorated. Is resin sealed for water resistance and maintenance free operation. Snap-in rubber feet included. The bulbs come with a year warranty. Also included are 2 15 foot extension cords that attach the sockets to the ballast. Flora Hydroponics exclusive new control kit is included in the bundle pack. Our kit contains pH Up, pH Down and pH Test Indicator. This is another great product available exclusively from Flora Hydroponics.