Tubes & Bulbs

Size Variations

LED tubes and bulbs come in various sizes to fit existing light fixtures. Here are the most common:

• T8: This is the standard size for fluorescent tubes, measuring 1 inch in diameter and typically available in lengths of 2ft, 4ft, and 8ft. LED tubes are designed as direct replacements for T8 fluorescents.
• T5: These tubes are slightly narrower than T8s, measuring 0.5 inches in diameter, and come in similar lengths. They are less common but can be an option for specific fixtures.
• A-Shape Bulbs: These bulbs resemble the classic incandescent bulb shape (A19) and come in various sizes, with the most common being the 60-watt equivalent LED bulb.
• BR Bulbs: These bulbs have a bulbous and round shape (BR30, BR40) and are often used for recessed lighting or track lighting.
• Candle Bulbs: These bulbs have a flame-like shape (CFL) and are ideal for decorative fixtures where aesthetics play a role.

Types of LED Tubes and Bulbs

Beyond size, there are several types of LED tubes and bulbs to consider:

• Dimmable: These LEDs allow you to adjust the brightness level, creating different ambiences in a space.
• Color Temperature: LEDs come in various color temperatures, ranging from warm white (yellowish glow) to cool white (bluish tint). Choose warm white for a cozy feel and cool white for task lighting areas.
• CRI (Color Rendering Index): This index measures a light source's ability to accurately display colors. A high CRI (above 90) is ideal for areas where color accuracy is important, such as retail stores or art studios.
• Wattage Equivalent: LED bulbs are labeled based on their incandescent bulb equivalent wattage. For example, a 10-watt LED bulb provides the same amount of light as a traditional 60-watt incandescent bulb.

Delving into LED Tube Types (A, B, and Hybrid)

While the standard overview covers essential aspects of LED tubes, understanding the different types – A, B, and Hybrid – is crucial for a more informed choice. Here's a deeper explanation:

Traditional Fluorescent Tube Replacements:

• Type A - Direct Replacement (Ballast Compatible): These LED tubes are designed to be a plug-and-play replacement for existing fluorescent tubes. They operate seamlessly with the existing fluorescent ballast, eliminating the need for rewiring or fixture modifications.

• Type B - Ballast Bypass: These LED tubes bypass the existing fluorescent ballast entirely. They have an internal driver circuit that converts line voltage directly to LED-compatible power.

Choosing Between Type A and B:

The ideal choice depends on your specific situation. Here's a quick guide:

• Choose Type A if:
  • You prioritize a simple installation process.
  • Your existing fluorescent ballast is functional.
  • You're on a tight budget and rewiring isn't an option.
• Choose Type B if:
  • You want to maximize energy efficiency.
  • Your existing ballast is malfunctioning or nearing the end of its lifespan.
  • You're comfortable with more electrical work and recertification cost.

The Hybrid Approach: Type A+B (Combo or Universal Tubes)

• These versatile tubes offer the best of both worlds: compatibility with existing ballasts (Type A) and the ability to bypass the ballast (Type B). They have a built-in switch or jumper that allows you to configure them for either operating mode.
• Benefits: Ultimate flexibility, works with or without a ballast, future-proof option.
• Drawbacks: Slightly higher initial cost compared to Type A or B tubes.

Choosing the Right LED Tube Type:

To make the best choice, consider your:

• Existing fluorescent fixture type and ballast condition.
• Electrical expertise for potential rewiring.
• Budgetary constraints.
• Desired level of energy efficiency.