If you’re currently using mostly incandescent bulbs in your home, you should swap out working bulbs for LED light bulbs. You’ll save enough money the first year or two in electrical costs to justify the purchase of LED bulbs. However, with CFL light bulbs, the difference in power consumption probably isn’t enough to monetarily justify throwing away a working CFL bulb to install an LED bulb. For bulbs you rarely use, such as in an attic, you’re probably better off waiting until the current bulb burns out before replacing it.