Brisbane five-eighth Darren Lockyer probably expected fireworks to mark his 300th premiership game, instead an electrical storm cut power to EnergyAustralia Stadium and Newcastle spoilt the party with a 28-12 victory.

The Knights slid out to a 18-6 lead at halftime and were never headed after making the most of the stormy conditions, which cut power to the stadium at the break.

The second-half was delayed for 40 minutes while ground staff fixed damage to the lines on the field that were washed out by rain during the thunderstorm.

Jarrod Mullen, who was a late inclusion for the Knights, scored a double while tries to Mark Taufua, Akuila Uate and six from six from captain Kurt Gidley's boot gave the Knights their fifth-win of the season.

Lockyer led the teams out prior to kickoff and received a warm ovation from the 18,154 Newcastle crowd in recognition of his milestone game.

He became only the fifth player in rugby league history to play 300 games for one club and is the fifth longest-serving one club player in history behind Cronulla's Andrew Ettingshausen (328) who retired in 2000.

Israel Folau opened the scoring for the Broncos in the 10th minute when he beat James McManus in the air to latch on to a cross field kick from halfback Peter Wallace.

Newcastle's Adam MacDougall, who gave a dominant display, drew one back when he put Taufua over the line in the 17th minute.

Lockyer kicked the ball out on the full from the following re-start and Newcastle almost capitalised from the mistake with 'Mad Dog' MacDougall ruled to be just short from the tryline.

Mullen showed no signs of a shoulder injury when he beat two tacklers to give the Knights a 10-6 advantage.

Then winger Akila Uate extended the Knights lead when he scooped up a Karmichael Hunt grubber and ran 70 metres to score in the 35th minute.

Mullen, named man of the match, scored his second in the 59th minute which effectively sealed the win for the Knights.

Sam Thaiday clawed one back for the Broncos in the 66th minute but any hope of a comeback was thwarted with Gidley's penalty in the 71st minute.

Newcastle coach Brian Smith hailed his side's performance as the best of the season.

"Our boys were determined tonight that they weren't going to let anything hold them back," Smith said.

"I can only speak for our boys, but I thought it was an outstanding win ... given the quality of the opposition.

"Maybe the lights going out affected them more than it did us, it certainly was a disruption."

Broncos captain Lockyer said he was pleased to get his personal milestone out of the way.

"Someone said to me at half-time (during the blackout) you'll remember your 300th," he joked.

"It's been a bit of a week, I'm glad it's over to be honest, a lot talked about it, it's over now and I really appreciate what Newcastle did for me tonight."

Broncos coach Ivan Henjak said he was disappointed with his team's discipline and inability to adapt to the greasy conditions.

"Full credit to Newcastle they just outplayed us tonight," Henjak said.

"We did get off to a good start but once the rain came we didn't handle the conditions too well.

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