it cost about 200 per bar and it puts out about put in the plants spectrem thats about 15,000 lumuns per bar. i was told it used 6 watts of electricity and the bulb lasts 10 years. the guy that was selling it to me said you would make your money back in the first year becuase of the saveing on electrictiy. he said it dosen't get hot eather. plants can be eaigher touching or real close i dont remember whitch one. Is it worth it to buy the 1 or 2 LED bar for 9 plants or use the traditional equipment?