can you use the actual bulbs from home depot...here's a link to their cheap hps and mh bulbs...will these work...?
http://www.homedepot.com/webapp/wcs/stores/servlet/ProductDisplay?jspStoreDir=hdus&catalogId=10053&productId=100023589&navFlow=3&keyword=400+watt+hps&langId=-1&searchRedirect=400+watt+hps&storeId=10051&endecaDataBean=com.homedepot.sa.el.wc.integration.endeca.EndecaDataBean%406f3d9773&ddkey=Search
http://www.homedepot.com/h_d1/N-5yc1vZ1xmi/R-100160341/h_d2/ProductDisplay?langId=-1&storeId=10051&catalogId=10053
http://www.homedepot.com/webapp/wcs/stores/servlet/ProductDisplay?jspStoreDir=hdus&catalogId=10053&productId=100023589&navFlow=3&keyword=400+watt+hps&langId=-1&searchRedirect=400+watt+hps&storeId=10051&endecaDataBean=com.homedepot.sa.el.wc.integration.endeca.EndecaDataBean%406f3d9773&ddkey=Search
http://www.homedepot.com/h_d1/N-5yc1vZ1xmi/R-100160341/h_d2/ProductDisplay?langId=-1&storeId=10051&catalogId=10053