SYLVANIA 20921 Box Eco Pentron Straight Tube 40 FP21/835/ECO 21W 3500K T5

( Brand: Sylvania ), ( Model: FP21/835/ECO ), ( Type: 20921 ), ( Unit Quantity: 1660 Jerrold Ave )

Review SYLVANIA Box Of 40 Pieces Fp21/835/eco Pentron 21w 3500k Straight T5 Tube

Introducing the Pennsylvania 20921 Box 40 FP21/835/ECO Pentron T5 LED Lighting System, a high-performance and energy-efficient lighting solution designed for various industrial, commercial, and residential applications.

This Pentron 21W T5 tube, model number FP21/835/ECO, is part of the ECO series, which is known for its exceptional energy savings and long-lasting performance. Each tube delivers a powerful 3500K color temperature, providing a natural and warm white light that mimics sunlight.

Measuring 48 inches in length, this T5 tube features a straight design, making it a versatile choice for a wide range of fixtures and installations. The tube's size is represented by the 'FP21' prefix, with 'FP' indicating the tube's diameter (21mm), and 'P' representing its shape (tube).

The ECO Pentron T5 tube utilizes advanced LED technology, which consumes significantly less energy compared to traditional T5 fluorescent tubes. In fact, this 21W LED tube can replace a 58W fluorescent tube, resulting in substantial energy savings and reduced operating costs.

Moreover, the LED technology in this tube offers a longer lifespan compared to its conventional counterparts. With an estimated lifespan of up to 50,000 hours, this T5 tube requires less frequent replacement, reducing downtime and maintenance costs.

Additionally, the FP21/835/ECO Pentron T5 LED tube is designed with a robust construction that can withstand harsh environments, making it suitable for industrial and commercial applications. It is also mercury-free, making it a more environmentally-friendly lighting choice.

In summary, the Pennsylvania 20921 Box 40 FP21/835/ECO Pentron T5 LED Lighting System is an energy-efficient, long-lasting, and cost-effective lighting solution that delivers natural and warm white light. Its straight 21W T5 tube, model number FP21/835/ECO, offers versatility, robustness, and a significant reduction in energy consumption and maintenance costs.

Pros and Cons of Buying a Pentron 21W T5 LED Tube (Pennsylvania 20921, Box 40, FP21/835/ECO)

The Pentron 21W T5 LED tube with the model number FP21/835/ECO is an energy-efficient lighting solution. This section will discuss the advantages and disadvantages of purchasing this particular LED tube.

1. Energy Efficiency: This LED tube consumes only 21 watts, making it an energy-saving alternative to traditional T5 fluorescent tubes.

2. Long Lifespan: The expected lifespan of an LED tube is significantly longer than that of a fluorescent tube, reducing the need for frequent replacements.

3. Instant Lighting: LED tubes do not require a warm-up period like fluorescent tubes, ensuring instant lighting when switched on.

4. Dimming Capability: This LED tube can be dimmed, providing greater control over the lighting level and energy consumption.

5. Better Color Rendering: LED tubes offer better color rendering index (CRI) than fluorescent tubes, resulting in more natural and accurate colors.

1. Initial Cost: LED tubes generally have a higher upfront cost compared to fluorescent tubes. However, the energy savings and longer lifespan can make up for the initial investment.

2. Incompatibility with Old Ballasts: LED tubes cannot be used with traditional magnetic ballasts. To use an LED tube, a compatible electronic ballast or a LED driver is required.

3. Sensitivity to Voltage Fluctuations: LED tubes are sensitive to voltage fluctuations, which can affect their performance and lifespan. An unstable power supply may cause the tube to flicker or fail prematurely.

The Pentron 21W T5 LED tube (Pennsylvania 20921, Box 40, FP21/835/ECO) offers several advantages, including energy efficiency, long lifespan, instant lighting, dimming capability, and better color rendering. However, it also has some disadvantages, such as a higher upfront cost, incompatibility with old ballasts, and sensitivity to voltage fluctuations.

Despite the initial investment and potential compatibility issues, the benefits of using an LED tube, such as energy savings, longer lifespan, and improved lighting quality, make it a worthwhile investment for businesses and homeowners seeking an efficient and advanced lighting solution. To ensure a successful installation, it is essential to verify compatibility with the existing electrical system and obtain the necessary electronic ballast or LED driver.

Details:

These T5 tubes provide bright and long-lasting illumination, making them a practical choice for various commercial applications. The product is a box of 40 pieces Sylvania 20921 FP21/835/ECO PENTRON 21W 3500K straight T5 tubes.

part #: 20921 prices

• $199.00-$430.00

specifications bulbbuffoon:

• brand: Sylvania
• model#: FP21/835/ECO
• type: 20921
• unit quantity: 1660 Jerrold Ave

general bulbbuffoon:

• condition: New
• Facility Maintenance Safety > Facility Lighting > Light Bulbs Lamps

offer bulbbuffoon:

• sold: 0
• options: Ship-to-home
• best offers: True
• quantity: 1
• availability: In Stock
• started: July 17, 2025

seller bulbbuffoon:

• # reviews: 420
• city: San Francisco, California
• rating: 100.0%

returns bulbbuffoon:

• policy: No Returns

shipping bulbbuffoon:

• cost: $30.72
• type: Calculated
• transit: 5-11 Days
• class: Expedited
• service: USPS Priority Mail
• carrier: USPS

payments bulbbuffoon:

• wallet: Apple-pay
• credit card: Diners-club
• other

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