I am really unsure about this. all i know is that with car headlights its really freaking bright. they are very low wattage and relatively cheap but i couldnt see a lumens description. Any held would be appreciated ex. http://www.homedepot.com/webapp/wcs...03+90401+501758&marketID=401&locStoreNum=8125
try these people http://www.greenshorticulture.co.uk/subcat.asp?subcat=125&cat=95 or these people http://www.tradehydro.com/catalog/envirolite-reflector-kits.html hope this helps
