Reading LED bulb specifications: light, shape and dimming

An LED bulb name can contain several different kinds of information. Watt equivalence, bulb shape, the description of the light and whether the bulb is dimmable are separate details. Reading them as one label can make two different catalogue entries look more alike than they are. This comparison keeps those fields attached to four specific products.

The selection includes A19 and A21 shapes, Daylight and Soft White descriptions, and both dimmable and non-dimmable listings. Pack quantities differ too. The larger number in a product name should therefore not be used as a shortcut for every other specification. Use the catalogue details below to compare the actual entries, and keep any stated watt-equivalence figure distinct from the other electrical information supplied for that bulb.

The catalogue comparison

40 Watt Equivalent, Daylight, Dimmable, A19 LED Light Bulb | 6-Pack

• With a life of 15,000 hours, the bulb will last over 13 years (based on 3 hours of use each day)
• Provides 450 lumens of light immediately, with no waiting time to warm up to full brightness
• With a correlated color temperature of 5000 Kelvin, the bulb simulates daylight, creating a bright atmoshphere for any room
• This LED light bulb uses only 6 watts of energy, saving up to $56.10 over the life of the bulb vs. its incandescent equivalent (based on 3 hours/day, 11 cents/kWh, may vary depending on rates and use)
• Not eligible for shipments to California

75 Watt Equivalent, Soft White, Dimmable, A19 LED Light Bulb | 2-Pack

• With a life of 15,000 hours, the bulb will last over 13 years (based on 3 hours of use each day)
• Provides 1000 lumens of light immediately, with no waiting time to warm up to full brightness
• This LED light bulb uses only 11 watts of energy, saving up to $105.60 over the life of the bulb vs. its incandescent equivalent (based on 3 hours/day, 11 cents/kWh, may vary depending on rates and use)

40W Equivalent, Daylight, Non-Dimmable, 15,000 Hour Lifetime, CEC Compliant, A19 LED Light Bulbs | 6-Pack (Renewed)

• With a CRI (color rendering index) of 90 this bulb will bring out the rich, natural colors wherever it is installed
• Provides 450 lumens of light immediately, with no waiting time to warm up to full brightness; operates up to 15,000 hours and will last over 13 years (based on 3 hours of use each day)
• With a correlated color temperature of 5000 Kelvin, this bulb simulates daylight, creating a bright atmosphere for any room
• Manufactured to meet California Energy Commission requirements for LED light bulbs

100 Watt Equivalent, Daylight, Dimmable, A21 LED Light Bulb, 16-Pack

• With a life of 15,000 hours, the bulb will last over 13 years (based on 3 hours of use each day)
• Provides 1500 lumens of light immediately, with no waiting time to warm up to full brightness
• With a correlated color temperature of 5000 Kelvin, the bulb simulates daylight, creating a bright atmosphere for any room

A useful shortlist

For a shortlist, write down the shape, light description, dimming designation and pack quantity for each candidate. Then read the complete linked listing rather than inferring compatibility from the photograph or from the word LED alone. This is a comparison of the catalogue's stated details, not a claim that different bulb shapes or dimming versions can replace one another.

Keep the exact product in view

Use the links to check the precise product and variant before adding anything to your basket. A similar photograph does not make two catalogue entries interchangeable. Read the name, dimensions, material and pack quantity together, and keep the units shown in the description. Current prices and availability belong on the linked product pages, so they are not repeated here. Where the catalogue supplies a care instruction, keep it with the product information. Where a detail is not stated, do not fill the gap with an assumption. This guide brings selected catalogue details together; the individual product pages remain the place to review the complete description and available options.