Looking for a high powered flashlight.Any recommendations?

My grandpa had something like this
http://www.basspro.com/webapp/wcs/stores/servlet/Product_10151_-1_10001_73596?cm_mmc=froogle--200-3-6-–1-_-38-528-154-00&hvarAID=46KY&mr:trackingCode=A3D8C02D-09D8-DC11-AA92-001422107090&mr:referralID=NA

that seemed to work really well for what you want

or this
http://www.northerntool.com/webapp/wcs/stores/servlet/product_6970_200029524_200029524?cm_ven=Aggregates&cm_cat=Froogle&cm_pla=Froogle&cm_ite=Froogle&ci_src=14110944&ci_sku=45693