I GREW UP IN SAC FOR MOST MY LIFE. HAD A GREAT BUDDY WORKING FOR SAC COUNTY SHERIFFS DEPT. HE SAID THEY CAN'T USE THE INFRARED GUN FOR GROW ROOMS IN THE CITY. TO MANY FACTORS THERE PUT OUT HEAT. BUT RIO LINDA, ELVERTA AND LOOMIS TYPE AREAS, THEY WILL DO FLY OVERS. (CAMP DOES THE FLY OVERS, NOT COUNTY SHERIFF). BUT IF YOU ARE WORRIED,, GO TO HOME DEPOT AND BUY "REFLECTIX". ITS A RADIANT BARRIER. REFLEX 97% OF RADIENT HEAT BACK TO THE ROOM. GREAT FOR THE ROOM LIGHTING ALSO. GOOD LUCK