I got 5 x 3W white and 5 x 3W Blue LED's complete with power drivers and heatsinks for £33 including delivery from Hong Kong. In this tank I have used the 5 White LED's and 3 Blue ones, The power supplys cost me nothing as I had som old note book ones lying around. I could have used a PC psu which you can pick up for a tenner or I could have had 240V drivers forthe same price.