Don"t need the light intensity of a 240W unit? The Lighthouse Hydro BlackStar 180UV is the answer. The 180w unit is the least expensive large form factor 3w light available. This unit covers 6 square feet (3"x2"). Sixty individual 3W LED Diodes in a light this size is extremely effective for flowering your plants. The BlackStar line has the best selling LED Grow Lights in the world for a reason - YOU CAN"T BEAT this combination of power and price. For this price you can gang them up and have a wonderful uniform grow and still get the peak PAR penetration that the 3 Watts chips deliver. 6 bands (unique color wavelengths) of light are used to optimize the light that flowering plants require.