CA10 vs E12 Bulbs: What are the Differences? - Comparison Guide
CA10 vs E12 Bulbs

CA10 vs E12 Bulbs: What are the Differences?

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Lighting plays a crucial role in setting the ambiance and enhancing the aesthetic appeal of any space. When it comes to choosing the right bulb, it’s important to consider factors such as brightness, energy efficiency, compatibility, and design. In this article, we will delve into a detailed comparison of two popular bulb types: CA10 and E12. By examining their specifications, features, and applications, we aim to help you make an informed decision based on your specific lighting needs.

Differences Between CA10 and E12 Bulbs

Features CA10 Bulbs E12 Bulbs
Form Factor Candle-shaped with a slight taper Candelabra-style base
Bulb Base Medium E26 base Candelabra E12 base
Compatibility Standard lamps and fixtures Chandeliers, sconces, candelabra-style sockets
Brightness Range: 25-60 watts Range: 3-60 watts
Light Output Lumens (lm) vary with wattage Lumens (lm) vary with wattage
Energy Efficiency Less energy-efficient compared to E12 bulbs More energy-efficient due to LED technology
Lighting Applications Decorative fixtures, chandeliers, wall sconces Decorative fixtures, ceiling fans, table lamps, accent lighting
Availability Widely available Widely available
Cost Generally more affordable Higher upfront cost but offers long-term energy-saving benefits

Form Factor and Design

The CA10 and E12 bulbs differ primarily in their form factor and base design. The CA10 bulbs feature a candle-shaped design with a slight taper towards the tip, resembling traditional incandescent flame-tipped bulbs. On the other hand, E12 bulbs, also known as candelabra bulbs, have a smaller base with a threaded screw design. This design allows E12 bulbs to fit into chandeliers, sconces, and other light fixtures that require a candelabra-style base.

Bulb Base and Compatibility

The bulb base is a crucial aspect to consider, as it determines the type of socket or fixture the bulb can be used with. The CA10 bulbs typically feature a medium E26 base, which is the standard base size used in many lamps and fixtures. On the contrary, the E12 bulbs have a smaller candelabra E12 base, making them compatible with candelabra-style sockets and fixtures.

Check also – CA10 vs B10 Bulbs: What are the Differences?

Brightness and Light Output

Brightness is a key factor when selecting a bulb. Both CA10 and E12 bulbs are available in various wattage options, allowing you to choose the desired level of brightness. CA10 bulbs typically range from 25 to 60 watts, while E12 bulbs are available in a wider range from 3 to 60 watts. However, it’s important to note that wattage alone does not determine the brightness. Lumens (lm) is the unit of measurement that indicates the actual light output. When comparing bulbs, it’s advisable to consider the lumens rather than the wattage.

Energy Efficiency

In today’s energy-conscious world, energy efficiency is a significant consideration. E12 bulbs generally tend to be more energy-efficient compared to CA10 bulbs. E12 bulbs often use LED (Light Emitting Diode) technology, which consumes less energy while producing equivalent or higher light output compared to traditional incandescent CA10 bulbs. Additionally, LED bulbs have a longer lifespan, reducing the frequency of replacements and lowering overall energy consumption.

Lighting Applications

The choice between CA10 and E12 bulbs can also depend on the lighting application. CA10 bulbs, with their flame-shaped design, are commonly used in decorative fixtures such as chandeliers, wall sconces, and pendant lights, where they can enhance the aesthetic appeal of the space. E12 bulbs, due to their candelabra base, are suitable for similar decorative fixtures as well as ceiling fans, certain table lamps, and accent lighting.

Availability and Cost

Both CA10 and E12 bulbs are widely available in the market, offering a range of options from various manufacturers. In terms of cost, CA10 bulbs are generally more affordable than E12 bulbs. However, considering the longer lifespan and energy-saving benefits of LED-based E12 bulbs, they provide better long-term value despite the higher upfront cost.


Choosing between CA10 and E12 bulbs ultimately depends on your specific lighting requirements, fixture compatibility, and desired aesthetic. The CA10 bulbs offer a traditional flame-shaped design and are commonly used in decorative lighting fixtures. Conversely, the E12 bulbs with their candelabra base provide versatility, energy efficiency, and a broader range of wattage options. By considering factors such as brightness, energy efficiency, bulb base, and design, you can make an informed decision that suits your lighting needs and preferences.

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