What happened 

Shares of lighting service company Acuity Brands, Inc. (NYSE:AYI) fell as much as 15.7% on Tuesday after reporting fiscal second-quarter earnings. At 1:30 p.m. EDT, the stock had recovered slightly but was still down 14.3% on the day. 

So what

Revenue rose 3.5% in the quarter to $804.7 million and net income was up 2.7% to $67.3 million, or $1.53 per share. After adjusting for one-time items, earnings were $1.77 per share, down from $1.80 per share a year ago. 

The problem is that investors had much higher expectations for the quarter. Wall Street estimates were for $825 million in revenue and $1.82 per share in earnings, so the results definitely fell short of that. 

Person holding an LED lightbulb.

Image source: Getty Images.

Now what

Management pointed out that the North American market declined modestly, so the results weren't as bad as they looked compared to the industry as a whole. But they also said manufacturing capacity and therefore fixed costs were up in anticipation of growth that hasn't yet arrived. And those costs will continue to pressure margins if revenue doesn't begin to pick up. 

Shares are trading at 26 times earnings, which is expensive for a company that isn't showing much growth. Until that changes, there will likely be pressure on this stock. 

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