I have all fluorescent lighting in the shack and most of the rest of the house has compact fluorescent bulbs. No problem unless I take a portable RX and hold the antenna within a foot or two of the light. -- 73 Warren K2ORS WD2XGJ 136-140kHz WD2XSH/23 505-510kHz WE2XEB/2 160-189kHz WE2XGR/1 505-515kHz FN42hi http://www.w4dex.com/wd2xgj.htm