For years, the rule of thumb on fluorescent bulbs was that they couldn't be dimmed. But not anymore! The new Dimmable Spiral Fluorescent Bulb works with most household dimmers and is dimmable down to 20%. Emits up to 1,380 lumens (equivalent to a standard 75-watt bulb) yet only uses only 23 watts of power. Get all the light you're accustomed to, yet only using one third of the energy! Conserving has never been easier than with these fluorescent light bulbs that are three times as efficient as standard, incandescent bulbs. Still, they emit a soft glow similar to that of incandescent lights, so your home won't have that harsh, washed-out look. Average life span for these bulbs is 8,000 hours more than five times standard 1,500-hour incandescent bulbs. Won't Interfere With Your Home Automation System These are also among the few fluorescent light bulbs on the market that won't cause problems with your X10 home automation system. The Smarthome technical staff has searched far and wide, high and low, and everywhere else in between for fluorescent bulbs that are X10-compatible, and these are among the very few that won't inject any noise in or near the critical X10 zero crossing point. For X10 operation, we recommend using non-dimming appliance modules, like the ApplianceLinc, although lamp modules will work if they are not dimmed.