TL-D Standard Colours Lumen Maintenance 3 h + 12 h cycle. TL-D Standard Colours Service Lifetime 3 h cycle. TL-D Standard Colours Service Lifetime 12 h ..

Replacement for Philips Tld 36W/54-765 4Ft Cool Daylight Tube

(model FL-36WT8-DL/TLD36WT8DL), this is a comprehensive description of the 4ft 36 Watt Standard Fluorescent Tube in a Daylight color temperature. It is one of the most common and powerful fluorescent tubes for general illumination.

Overview & Core Specifications

The 4ft 36W T8 Daylight Fluorescent Tube is a high-output, long-lasting light source widely adopted in commercial, industrial, and large residential settings. It provides significant illumination over large areas while maintaining good energy efficiency for a traditional fluorescent technology.

Physical & Dimensional Details

As indicated in the dimensional drawing on the image:

• Tube Diameter (D max): $28$ mm

• Length (A max): $1,199.4$ mm

• Length (C max - Including Pins): $1,213.6$ mm

These precise dimensions ensure compatibility with standard 4-foot G13 T8 fixtures and replacement for many older 40W T12 tubes (the T8 is thinner and more efficient).

High Output Daylight Light Quality

The tube's Daylight color temperature is its defining characteristic, making it perfect for environments where bright, stimulating light is required.

• Color Tone: Emits a very bright, crisp, cool-white light that closely resembles natural light on a clear day (6500K).

• Effect on Mood: This high CCT light is known to promote alertness and concentration, making it ideal for tasks that require visual focus.

• Application: Excellent for large industrial halls, warehouses, workshops, laboratories, and high-ceiling offices where maximum light coverage is necessary. It is often preferred for lighting plants, aquariums, and areas where colour distinction is important, although a higher Color Rendering Index (CRI) tube (e.g., 865 Triphosphor) would be better for true colour representation (standard daylight tubes typically have a CRI in the low 70s).

Performance and Efficiency

The 36W rating offers an effective balance between energy use and powerful light output compared to older, higher-wattage alternatives.

• High Lumens per Watt: Provides a significant amount of light (lumens) for the energy consumed (watts), leading to lower electricity bills over time.

• Long-Term Value: The extended operating life, often ranging from 15,000 to 20,000 hours with modern electronic ballasts, drastically reduces maintenance time and replacement costs.

Summary of Benefits

• Powerful Illumination: High lumen output makes it suitable for lighting large spaces effectively.

• Standard Compatibility: Fits readily into existing 4ft T8 G13 fixtures, simplifying replacements.

• Energy and Cost Savings: Good efficiency and very long life minimize operational expenses.

• Clarity and Alertness: Daylight color promotes visual clarity and focus for task-intensive environments.

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