You can only do 4x20W in an 80W ballast if it is an electronic load-sensing one. What you have is an old coil ballast. It will not work properly with anything other than 2x40.
80 gal FW with 30 gal DIY wet/dry/sump.
9 fancy golds, 1 hillstream loaches, 1 rubber-lip pleco (C. thomasi), 3 SAEs, small school of white cloud minnows, planted.