Obama-era rules banning low-efficiency light bulbs are now in full force. You don't have to throw away your incandescents, but switching to LEDs could lower your utility bills.

• New federal rules governing the energy efficiency of lighting systems went into full effect Tuesday.
• They effectively end the sale and manufacture of incandescent light bulbs.
• You don't have to throw away incandescent bulbs you already own, but switching could save you money.

SAN FRANCISCO (AP) — Get ready to say goodbye to the once ubiquitous incandescent light bulb, pioneered by Thomas Edison more than a century ago. You can thank — or blame — new federal energy efficiency regulations that went into full effect Tuesday. Quite possibly without you even noticing.