Craig Mackail-Smith's fifth goal in three games helped take Brighton top of the Championship.
Gus Poyet's side handed Sheffield Wednesday a sound beating after taking a first-half lead through Wayne Bridge's deflected free-kick.
Mackail-Smith added a second in the 54th minute following a jinking run from Spanish full-back Bruno Saltor.
Will Buckley made it three from Bruno's lofted diagonal pass to seal Brighton's third straight win.
It means Dave Jones's Wednesday side have suffered back-to-back defeats after collecting seven points from their first three league games.
Buckley forced an early save from Owls' goalkeeper Chris Kirkland before Bridge's 24th-minute free kick looped in off Rhys McCabe.
The visitors struggled to create clear chances in the opening 45 minutes, and Jones brought on teenager Ross Barkley at half-time to make his debut.
signed on a month's loan from Everton,
could not spark a revival though, and Brighton increased their lead nine minutes into the second half.
Bruno evaded a series of challenges as he cut into the penalty area from the right, and his low cross was stroked in by Mackail-Smith.
The full-back also created Brighton's third goal with a pass that caught out Wednesday's defence and found Buckley, whose first touch set up a cool, chipped finish.
Kirkland then kept out a Mackail-Smith header, with Brighton keeper Tomasz Kuszczak making excellent late saves to deny Jay Bothroyd and Joe Mattock.
Brighton & Hove Albion 29 Kuszczak 02 Bruno Booked 03 Greer 06 El-Abd 28 Bridge 04 Hammond 18 Dicker 26 Bridcutt 30 Buckley (Orlandi - 77' ) 09 Barnes (David Lopez - 82' ) 12 Mackail-Smith (Dobbie - 69' ) Substitutes 16 Ankergren 05 Dunk 14 Calderon 11 Orlandi 21 David Lopez 25 LuaLua 10 Dobbie Sheffield Wednesday 01 Kirkland 05 Taylor 14 Mattock 19 Beevers 32 Llera Booked 06 Semedo 07 Antonio 11 J Johnson (Pecnik - 64' ) 16 McCabe 15 Rodri (Barkley - 46' Booked ) 23 Bothroyd (Madine - 87' ) Substitutes 43 Bywater 20 Lee 24 Barkley 09 Madine 10 Maguire 12 O'Grady 17 Pecnik