40 watt light bulb

Common base sizes shown are candelabra E12 and standard medium E26 bases.

Typical shapes and sizes listed include B11 candelabra bulbs, A15 appliance bulbs, A19 general‑purpose bulbs, and various BC decorative shapes.

Actual power use depends on the technology. Examples shown include LEDs using about 4.5 W or 5.5 W, a color‑changing LED using 9.5 W, and an incandescent appliance bulb using 40.0 W.

Rated lifespans vary by product: some colored LEDs list about 10,000 hours (≈9.1 years), certain LED A19 options show up to 13.7 years, while an incandescent appliance bulb is listed at about 1.4 years.

Certifications and ratings vary by listing. Examples include UL listing and wet‑location ratings. Federal efficiency compliance is inconsistent across items (some list compliance, others do not). Listings also note attributes such as “Contains mercury: No.”

Reported lumen outputs include values like 415 and 450 lumens; some decorative or color‑only listings show “Lumens: 0” or omit a numerical lumen value. Shown CRI values in listings include 90 and 99, while some entries list 0 where the value is not provided.