Dec 17, 2013 #1 PurplePolyp Aquarium Advice Freak Joined Jun 16, 2012 Messages 381 Location Blanchard, OK I have a 4-bulb fixture for my tank. Is it okay to swap all four lights at once?
Dec 17, 2013 #2 Sniperhank Giant Clam Addict Joined Nov 18, 2011 Messages 20,651 Location Summerville, Pennsylvania As long as the bulbs weren't too old and dulled out it shouldn't shock anything.