ST64 vs ST19 : Which Should You Pick?

Bulb codes like ST64 and ST19 often confuse buyers. Lighting buyers find it complex to find the bulb that best suits their requirements. With different types of light bulbs available, choosing a suitable light bulb is challenging. But don’t worry! This guide will help you in choosing the best light bulb by providing a detailed ST64 vs ST19 comparison.

What Does ST64 vs ST19 Mean?

Simply stated, ST64 and St19 are bulb codes that provide a bulb with its unique identity. Every bulb has a different code from others, and this code is what explains the shape and diameter of bulbs. 

The ST in bulb codes stands for Straight Tubular. ST refers to the typical Edison-style bulb shape. As for the number that follows ST in codes, it refers to the diameter of the bulb. 

In the ST19 code, the ever-famous imperial measurement system is used. You can calculate the diameter of this bulb very easily as 19 × 1/8 inch = 2.375″. Compared to the ST19 bulb, the ST64 Bulb uses a metric measurement system. The diameter of this bulb is  64mm = ~2.52″.

The difference in the measurement system arises because of the difference in markets. A clear understanding of imperial vs metric systems helps buyers in making the right choice.    

ST64 vs ST19: A Quick Comparison Table

The table below compares ST19 and ST64 bulbs based on their shape, size, and applications:

Despite the discrepancies, both bulbs usually use the same E26 base.

What is an ST64 Bulb?

ST64 bulbs have a height of 5.4 inches and a diameter of 2.52 inches. The look of this bulb is elongated, and these bulbs are popularly used in residential and commercial settings.

The ST64 bulbs are frequently used when the light fixtures are open or when a vintage feel is desired. As ST64 delivers a bright and uniform lighting distribution, it is the best type of light for warehouses, industries, and restaurants. 

What is an ST19 Bulb?

This Edison-style bulb measures around 5.375″ high and 2.375″ wide. It is smaller than the ST64, hence it is ideal for smaller workspaces.

This bulb comes in handy when the light fixtures are small or enclosed. ST19 bulbs are frequently installed in compact or enclosed places, such as ceiling fan lights, different types of chandeliers, vanity lights, wall sconces, and table lamps. 

These bulbs provide a balance of lighting and aesthetics, and are thus common in indoor lighting fixtures.

ST58 vs ST19 – Are They the Same?

In a true sense, both of these light products are similar. The only difference between these bulbs is in terms of labelling:

• ST19 uses the imperial system (i.e., 2.375″ diameter) and is widely used in the US.
• ST58 uses the metric system (i.e., 58 mm diameter) and is frequently used in the European market.

Both these LED Edison light bulbs share identical dimensions, and this is the reason that they can be used interchangeably if the light fixtures allow.

ST19 vs A19 – Shape Comparison and Compatibility

ST19 and A19 are commonly used LED Edison light bulbs. They both share the same size and E26 base but differ from each other on the basics of their appearance. 

The A19 bulb is commonly used in residential settings, i.e., in kitchen, bedroom, and ceiling fixtures. The bulb features a rounded top with a traditional look. ST19, on the other hand, boasts a more tubular and elongated shape with a vintage look.

Thus, it is commonly used in decorative lighting. The comparison between ST19 vs A19 and A19 vs A21 Light Bulbs guides and allows businesses to make the ideal decision. 

ST19 vs E26 – What’s the key difference?

The comparison of ST19 vs E26 often confuses DIY decorators, as they consider only the bulb’s look. But in reality, the difference between the ST19 and E26 bulbs is in terms of basic terminology. Both these terms can be used together as they refer to different characteristics.

ST19 refers to the bulb’s look, while E26 refers to the bulb base size. You may come across a bulb labelled ST19 with an E26 base.

This means that the bulb has a vintage body with a diameter of 2.375 inches and can fit into typical US sockets.

Regardless of the bulb selection, opt for models with high IP ratings to ensure resistance against dust and moisture. Choosing a high-rated bulb is equivalent to choosing a bulb with a long lifespan.

Edison Bulb Shape & Size Chart: ST18, ST64, A19, G25 & More

An LED Edison light bulb chart featuring both imperial and metric codes, along with the shape description, is given below:

How to Choose the Right Edison Bulb for Your Fixture?

Homeowners cannot just choose a light for bedrooms as it is dimmable. Similarly, industrial buyers cannot just choose a cheap commercial lighting source.

Many different factors should be considered when selecting an Edison bulb for your lighting applications. Below are key considerations to guide you with your decision-making process:

1. Fixture Size:

The first thing you should consider while choosing the Edison light bulb type is fixture size. If the fixture is tight or enclosed, choose ST19 bulbs. If the fixtures are open and large, go for ST64 bulbs.

2. Visibility:

If you, as an interior stylist, consider that the bulb should be visible or exposed, then go with ST64. ST64 is an attractive and vintage bulb, thus enhancing the overall look.

Similarly, if the bulb is to be installed in a place that is hidden, ST19 is the best choice. The reason behind this is that ST19 is compact, so it fits well in smaller spaces.

3. Decor Style: Vintage vs Modern:

In transitional spaces, ST19 light bulbs give a modern look. On the other hand, if you want to provide your space with a vintage aesthetic, choose ST64.

4. Lighting Application:

ST64 is utilised in ceiling fan lights, string lights, and kitchen pendant lights. For desk lamps, vanities, and other compact spaces, use ST19.

5. Brightness Needs:

The lumens-to-watt ratio or the brightness requirements also influence the bulb choice. ST19 produces 400–600 lumens. Whereas ST64 produces higher lumens, i.e, 400–900 lumens, it is ideal for places requiring brightness. 

The only issue that may be incurred while using these bulbs is an increased electricity bill. Be sure to consider the bulb’s voltage to lower your electricity bill; a lower-voltage bulb utilises less electricity, thus saving on energy and costs.

FAQs

Q1. What does ST64 mean on a lightbulb?

ST64 is a light bulb code that defines the shape and size of a bulb. ST stands for Straight Tubular, while 64 indicates the bulb’s diameter in mm.

Q2. What is the difference between ST64 and ST18?

The main difference between the mentioned bulbs lies in their dimensions. ST64 bulbs are typically larger and wider compared to ST18 bulbs. Both ST64 and ST18 are vintage-style bulb shapes and are suitable for different fixtures.

Q3. What size base is an ST58 bulb? 

An ST58 light bulb typically features a base size of E26. E26 is a standard screw size for most lighting fixtures, specifically in the North America. The ST58 bulb’s compatibility with several fixtures makes it a popular choice for residential and commercial use.

Q4. Are E26 and A19 the same?

E26 and A19 are not the same. E26 refers to the base type a 26mm Edison screw, while A19 describes the light bulb shape and size. Many A19 bulbs utilise an E26 base, but these terms are not interchangeable.

Conclusion:

There are many ways to light up a home or commercial space, and choosing the right one is important. Now that you have a different light bulbs comparison, including ST19 vs ST58 and ST58 vs ST19, it’s time to take action.

Understand and decode the bulb code meanings to make a suitable choice. Also, don’t just retain your focus on the light bulb type; make sure to choose a reliable supplier, too. 

Opting for a reliable supplier can provide you with a competitive advantage in the long run. So, try to account for factors that will assist you in choosing the right lighting supplier.

A Trusted Partner for All Your Lighting Needs

With 13+ years of experience, Risun Corp is a trusted partner for all your lighting needs and business. Our commitment to excellence puts us way ahead of our competitors. 

Our expert team utilises an innovative approach to deliver tailored lighting solutions. With a deep understanding of the market, we continue to meet the changing demands of our clients.

So what are you waiting for? Contact us today to get a custom bulk quote.