Light Bulb Saving Time

“Every time I go to Costco, I buy more wattage,” Ms. Williams said the other day. She is as green as anybody, she added, but she can’t abide the sickly hue of a twisty compact fluorescent bulb, though she’s tried warming it up with shade liners in creams and pinks. Nor does she care for the cool blue of an LED.

It should be noted that, like most decorators, Ms. Williams is extremely precise about light. The other day, she reported, she spent six hours fine-tuning the lighting plan of a project, tweaking the mix of ambient, directional and overhead light she had designed, and returning to the house after dusk to add wattage and switch out lamps like a chef adjusting the flavors in a complicated bouillabaisse.

She is aware that there is legislation that is going to affect the manufacture of incandescent bulbs, but she’s not clear on the details, and she wants to make sure she has what she needs when she needs it.

So does John Warner, a restaurateur in Washington whose new bistro, Le  Zinc, will open next month on Wisconsin Avenue. He has signed a 15-year lease on the place, which is layered in warm woods, with lots of art and photographs and 50 light fixtures, 16 of them designed to hold a 40-watt soft-white G.E. incandescent bulb. By estimating that his lights will be on for 15 hours a day, and factoring in the package’s promise of a 2,000-hour life span per bulb, Mr. Warner has calculated that he will need 600 of these bulbs to last through his lease.

“I have a light-enough carbon footprint in the other aspects of the design,” he said, “so I can allow myself a lighting splurge.”

Darren Henault, a Manhattan decorator, has already splurged on light fixtures in his Millbrook, N.Y., farmhouse, which dates from the early 19th century, and he is fearful that the bulbs sold in the future won’t be up to snuff.

“We went to great pains to keep it looking like an 1800s farmhouse,” he said. “We used reclaimed woods, kept the old hardware and the old doors.” He also added a dozen custom light fixtures, he said, including “one in particular that cost an arm and a leg, and only works with these particular incandescent bulbs.”

He has filled the basement with antique-style Edison bulbs — the clear bulbs with the fuzzy filaments that restaurant designers are so fond of — as well as silver-bottomed incandescent bulbs, which throw light on the ceiling in an appealing way, both of which he buys in bulk at Gracious Home. (The former cost $19 each; Gracious Home is no Costco.)

“My electrician said they were being phased out,” he said. “If he’s wrong, I’m going to kill him.”

As it happens, Mr. Henault’s electrician is wrong.

Late in his second term, George W. Bush signed into law the Energy Independence and Security Act of 2007, which requires light bulb makers to improve the efficiency of incandescent bulbs by 25 percent. The details of the law dictated a phase-out of the manufacture of certain bulbs in their current incarnation, starting with 100-watt bulbs next January.

The law does not ban the use or manufacture of all incandescent bulbs, nor does it mandate the use of compact fluorescent ones. It simply requires that companies make some of their incandescent bulbs work a bit better, meeting a series of rolling deadlines between 2012 and 2014.

Furthermore, all sorts of exemptions are written into the law, which means that all sorts of bulbs are getting a free pass and can keep their energy-guzzling ways indefinitely, including “specialty bulbs” like the Edison bulbs favored by Mr. Henault, as well as three-way bulbs, silver-bottomed bulbs, chandelier bulbs, refrigerator bulbs, plant lights and many, many others.

Nonetheless, as the deadline for the first phase of the legislation looms, light bulb confusion — even profound light bulb anxiety — is roiling the minds of many. The other day, Ken Henderlong, a sales associate at Oriental Lamp Shade Company on Lexington Avenue, said that his customers “say they want to stockpile incandescent bulbs, but they are not sure when to start. No one knows when the rules go into effect or what the rules are.”