Introduction
To help you understand the impact, this article aims to answer a series of basic questions by explaining what kind of temperature range that the LED itself needs to work under for outdoor or indoor use and its relationship with ambient air or environment, helping you avoid installing inappropriate ones and guiding you on suitable choices.When choosing LED strip lights, most customers understand clearly the importance of some immediate and obvious specification parameters, such as luminous output (brightness) and power consumption, for judging the immediate performance and power consumption of the product. It’s certainly of primary importance. However, this focus hides something much more critical but not obvious, something that affects the end result of your installation/lifestyle: operational working temperatures of LEDs themselves and how this relationship changes with ambient temperature fluctuation and with adjustments to input power. The performance & lifetime of LEDs are severely affected by thermal conditions.
In this article, I would like to expose these hidden truths to you based upon real LabTest data from the SuntechLite high-performance flexible wall washer light series, analyzing how ambient air temperature fluctuations, with varying levels of input power applied to it, affect the vital operational working temperature of the LED strip directly. My purpose is to translate lab-test results into practical instructions/advice that you can act on right now, thus helping you install LEDs not only brilliantly but also safely and effectively in the long term.
Key Thermal Metrics for LED Performance and Lifespan
To judge how well and reliably an LED works, you need to know three temperatures.
1.Ambient temperature (Ta) is the temperature of the air around you at 33°C.
2.Junction temperature (Tj) is the LED chip’s hottest point. It is found by adding the case temperature to the thermal resistance and then multiplying by the power.
3.shows the temperature rise (ΔT) as the housing: ΔT = Tcase – Ta
Analysis of Power and Temperature Rise of Flexible Wall Washing Light
Refer to product data. For doing power analysis. And temperature rise analysis of flexible wall washer:
Test equipment used:
UNI-T UT320D Thermocouple Thermometer.
Product: White Color Flexible LED Wall Washer Fixture 23*23mm
The structure includes a 23 mm x 23 mm silicone package. Aluminum substrate plus flexible PCB.
Thermal resistance for flexible wall washers is usually higher than traditional rigid ones.
Test data analysis (14.4w/m flexible wall washer light)
| Item | Measured result |
|---|---|
| Power | 14.4W/m |
| Light time | More than 30 minutes |
| Environment temperature (Ta) | 33.6℃ |
| Surface temperature (Tcase) | 44.6℃ |
| Temperature rise (ΔT) | 44.6℃ - 33.6℃ = 11℃ |
The ambient temperature and working temperature of the LED flexible wall washer are shown in the following figure.
Test data analysis (24w/m flexible wall washer light)
| Item | Measured result |
|---|---|
| Power | 24W/m |
| Lighting time | More than 30 minutes |
| Environment temperature (Ta) | 33.6℃ |
| Surface temperature (Tcase) | 52.2℃ |
| Temperature rise (ΔT) | 52.2℃ - 33.6℃ = 18.6℃ |
The ambient temperature and working temperature of the LED flexible wall washer are shown in the following figure.
Analysis: Power & Ambient Temperature Effects
1. Power increase means higher temperature rise.
As data shows, power increases from 14.4 W/m to 24 W/m.
Caused the temperature rise to jump.
From 11°C up to 18.6°C.
That is a 69% increase.
Conclusion: Higher input power generates more heat.
We need better heat dissipation.
2. Working temperature equals ambient plus internal rise.
LEDs do not generate heat in isolation.
Their final operating temperature is the result of:
Working Temp = Ambient Temp + Thermal Rise.
If ambient temperature rises.
For example, in outdoor environments.
Or in enclosed spaces.
The LED’s working temperature may exceed safe limits.
For example:
At 45°C ambient:
14.4 W/m may reach about 56°C.
24 W/m may reach about 63.6°C.
Such temperatures can impact LED lifespan.
These temperatures can also affect the adhesive integrity of the LEDs.
These temperatures can also lead to plastic deformation.
Installation Tips&Safety suggestions
Provide sufficient airflow around LED strips. This is particularly important for high-power LED strips. To prevent heat buildup.
Ensure ideal performance conditions.Avoid installation in enclosed spaces. Not in sealed enclosures. This also applies to areas that are tightly confined. Or poorly ventilated walls. Where heat cannot escape.
Using aluminum channels or maybe the heat sinks. To draw the heat away. Away from the LED chips. It improves the thermal management systems. Additionally, it will also enhance the product’s lifespan.
Monitor environmental conditions regularly. Check the ambient temperature and its fluctuations. Especially important for outdoor types of installations. The weather conditions greatly influence the heat management.
Incorporate smart protection. Consider thermal protection ICs. Alternatively, you could incorporate temperature sensors. Enable automatic shutdown. Or reduce brightness in overheating.
In addition to Some of the above installation tips and suggestions, we also have many for those with a deeper interest, we invite you to explore these products in further detail.
How to Install LED Strip Lights on Ceiling: 3 Methods for Flawless Ambiance
How To Install LED Strip Around Corners
How to Install LED Strip Lights on the Wall: Damage-Free Hacks for Renters & Homeowners
Conclusion
The findings are supported by empirical evidence gathered through testing. Plus industry-wide data. This provides a definitive understanding of the situation. Non-negotiable also. The ambient operating environment is key. The choice of power input also plays a crucial role. They are the most critical external factors. These factors directly influence the internal working temperature of an LED light. The internal working temperature of an LED light is directly affected by these factors. This relationship is direct. And it is measurable. Has profound implications. For the success of any installation.
Therefore, during the planning phase. And the design phase too. Of your LED lighting projects. Whether for architectural accents. Or robust outdoor landscape lighting. Or demanding commercial applications. Like 24/7 operation in retail. Or high-lumen-output task lighting. A comprehensive strategy is needed. For thermal management. It is an absolute necessity. Cannot be overlooked. Or compromised. It should not be overlooked, compromised, or treated as a secondary concern.
To ignore this fundamental aspect. This fundamental aspect pertains to electrical engineering specifically. And optical engineering, too. Is to jeopardize the entire project. Risks premature lumen depreciation. That dims visual impact. And potential color shifting. Alters the designed ambiance. And ultimately shortens product lifespan. Compromises reliability. Increases total cost of ownership. Integrating heat dissipation solutions. Such as aluminum channel heat sinks. And adequate ventilation pathways. Also appropriate power derating. From the very beginning. It is not an added expense. It is an essential investment. For the performance and safety. And the longevity of your lighting system.
If you need help. For choosing the right LED strip. Or have questions about temperature safety. Feel free to contact us.
www.suntechlite.com