Washington ? Republicans in Congress are flipping the dimmer switch on a law that sets new energy-savings standards for light bulbs.

They’ve reached a deal to delay until October enforcement of standards that some fear will bring about the end of old-style 100-watt bulbs. GOP lawmakers say they’re trying to head off more government interference in people’s lives.

But environmentalists and the light bulb industry say the move is not too bright.

Language postponing enforcement of the light bulb law — it was set to take effect Jan. 1 — was included in a massive spending bill that funds the government through September. The House passed the measure on Friday, with approval expected Saturday in the Senate.

Rep. Fred Upton, chairman of the House Energy and Commerce Committee, said the light bulb delay shows Congress is listening to the American people.

“We heard the message loud and clear,” said Upton, R-Mich. “Americans don’t want government standards determining how they light their homes.”

Upton said he was not opposed to the more efficient — and expensive– curlicue fluorescents that have become increasingly familiar in recent years. But he said government should not penalize those who prefer traditional, incandescent bulbs.

“New lighting options are great news for the public, but the lesson is that markets and consumer demand are the best drivers of innovation and new choices,” Upton said.

Sen. Jeff Bingaman, chairman of the Senate Energy and Natural Resources Committee, said the move would have little practical consequence, since it does not affect a 2007 law that requires manufacturers to produce or import more efficient bulbs. The five largest light bulb manufacturers have already switched to making and selling the more efficient bulbs, Bingaman said, so the enforcement delay only serves to confuse the public.

“Blocking funds to enforce minimum standards works against our nation getting the full benefits of energy efficiency,” said Bingaman, D-N.M., a key sponsor of the 2007 law, which was signed by President George W. Bush.

A group representing light bulb manufacturers spoke out against the delay, which applies only to 100-watt bulbs. Tighter standards for 75-watt bulbs take effect in 2013, and lower wattage bulbs must be more efficient by 2014.