When it comes to choosing the right light bulb, there are many factors to consider. One common choice is between ST19 and A19 bulbs. In this in-depth comparison, we will explore the differences in size, shape, light output, energy efficiency, and more to help you make an informed decision.
What are ST19 and A19 bulbs?
ST19 and A19 bulbs are both types of Edison bulbs, also known as filament bulbs, which have a warm, vintage look. They both use the same E26 medium base, making them compatible with most standard light fixtures.
The main difference between the two is their shape. ST19 bulbs have a slightly elongated shape with a wider and rounder middle section, resembling a teardrop. On the other hand, A19 bulbs have a more traditional, spherical shape.
Size and shape
ST19 bulbs are typically larger than A19 bulbs, measuring around 2.4 inches in diameter and 5 inches in length. A19 bulbs, on the other hand, are usually around 2.4 inches in diameter and 4.25 inches in length. Due to their larger size, ST19 bulbs may not fit in all light fixtures, so it’s important to check the dimensions before purchasing.
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In terms of light output, both ST19 and A19 bulbs are available in a range of wattages and lumens, making them suitable for different lighting needs. However, ST19 bulbs typically have a wider beam angle than A19 bulbs, which can create a softer, more diffused light.
When it comes to energy efficiency, both ST19 and A19 bulbs are available in LED versions, which are more energy-efficient than traditional filament bulbs. LED ST19 bulbs typically use around 5-7 watts of power, while LED A19 bulbs use around 6-10 watts.
Color temperature and CRI
Another important factor to consider when choosing a light bulb is the color temperature and CRI (Color Rendering Index). ST19 and A19 bulbs are available in a range of color temperatures, from warm yellow to cool white, and a range of CRI values, which determine how accurately colors are rendered under the light.
In terms of price, ST19 bulbs are usually more expensive than A19 bulbs due to their larger size and unique shape. However, the price may vary depending on the brand and features of the bulb.
The choice between ST19 and A19 bulbs depends on your personal preference and lighting needs. If you’re looking for a vintage, unique look and a softer, more diffused light, ST19 bulbs may be the right choice for you. However, if you’re looking for a more traditional, spherical shape and a wider range of options, A19 bulbs may be a better fit. Ultimately, it’s important to consider the size, shape, light output, energy efficiency, color temperature, and CRI when making your decision.