ETENWOLF FL2 Flashlight Thermal Rise Test Report (4-Hour Continuous Operation, White & Red Light)

Document Overview

Key Findings The ETENWOLF FL2 Flashlight completed a 4-hour continuous thermal rise test under both white and red light modes; peak component temperatures reached up to 118.4 °C (flood light, Sample 1#) against an ambient of 31.4 °C, with the test result classified as For…

Document type

Test Report

Prepared by

Ryan Cooper

Published

July 21, 2026

Last reviewed

July 21, 2026

Topics

Environmental Testing

Key Findings

The ETENWOLF FL2 Flashlight completed a 4-hour continuous thermal rise test under both white and red light modes; peak component temperatures reached up to 118.4 °C (flood light, Sample 1#) against an ambient of 31.4 °C, with the test result classified as For Reference Only rather than a pass/fail determination.

• Product: FL2 Flashlight (FL2手电筒)
• Report No.: 2025103001.0
• Test Date: 2025-10-30
• Samples: 2 PCS (1#, 2#)
• Test Type: Reliability Test
• Standard: Internal Standard
• Ambient Temperature: 31.4 °C
• Highest Peak Temperature Recorded: 118.4 °C (Flood Light, Sample 1#)
• Highest Temperature Rise Recorded: 87.0 K (Flood Light, Sample 1#)
• Verdict: For Reference Only

Test Overview

Test Equipment & Setup

Test Procedure

1. Pre-Test: Allow samples (1# and 2#) to equilibrate to room temperature (31.4 °C).
2. Sensor Placement: Attach Type-K thermocouple probes to all designated measurement points: Red Light, Flood Light, Spot Light, Laser, U1, U2, U4, and U5.
3. Activation: Enable both white light (flood and spot) and red light modes simultaneously on each sample.
4. Data Collection: Record thermal rise data continuously over a minimum 4-hour period until temperatures reach a stable plateau.
5. Post-Test: Power off samples, record final peak temperatures and calculated temperature rises (ΔT in Kelvin) for each measurement point.
6. Acceptance Criteria: Verify that no component temperatures exceed levels that would cause damage; assess compliance with safety and performance requirements. Results for this test are classified as For Reference Only.

Test Data & Results

Observations: Flood Light exhibited the highest peak temperature (118.4 °C, Sample 1#) and highest temperature rise (87.0 K, Sample 1#). Spot Light followed closely at 112.3 °C / 80.9 K. Laser and U4 measurement points showed the lowest thermal rise values across both samples. Sample 2# consistently recorded slightly lower or comparable temperatures versus Sample 1#, indicating reasonable unit-to-unit consistency. Detailed time-series thermal rise data is available on the sibling sheet (温升变化数据 — Temperature Rise Change Data).

Conclusion

Document Information

Frequently Asked Questions

What is the maximum temperature the ETENWOLF FL2 Flashlight reaches during 4-hour continuous operation?

During 4-hour continuous operation with both white and red light active, the FL2 Flashlight reached a peak temperature of 118.4 °C at the Flood Light measurement point (Sample 1#), with an ambient temperature of 31.4 °C. This represents a temperature rise of 87.0 K above ambient.

Which component on the FL2 Flashlight gets hottest during extended use?

The Flood Light emitter recorded the highest temperatures on both test samples — 118.4 °C on Sample 1# and 111.8 °C on Sample 2#. The Spot Light was the second-hottest point, followed by U2, Red Light, U1, U5, Laser, and U4 in descending order.

Does the FL2 Flashlight pass the thermal rise test?

This thermal test was conducted under an internal standard and classified as For Reference Only — no formal pass or fail determination was issued. The data is intended to inform ongoing design review and safety assessment rather than certify compliance with an external standard.

What equipment and method were used to measure thermal rise on the FL2 Flashlight?

A thermal rise tester with Type-K thermocouples was used. Probes were placed at eight measurement points (Red Light, Flood Light, Spot Light, Laser, U1, U2, U4, U5). Both white light and red light modes were activated simultaneously, and temperature data was recorded continuously for 4 hours until readings stabilized.

Related Products

• ETENWOLF FL2 Flashlight — Product Page
• Related Test Sheet — Temperature Rise Change Data (温升变化数据): The sibling sheet from the same Excel file contains time-series thermal rise data recorded during this test. Refer to the 温升变化数据 sheet for interval-by-interval temperature readings across all measurement points for both Sample 1# and Sample 2#.