It’s no secret that some people are sceptical about the performance of solar lighting. The availability of cheap, poorly made solar lights and early experiences with older or low-quality solar light products left a lasting impression that solar lights are unreliable or ineffective. These products may have low-capacity batteries, subpar solar panels, or poor weather resistance, leading to short lifespans and disappointing performance.

However, solar technology has come a long way, and modern solar lights can provide bright, long-lasting illumination while being eco-friendly and cost-effective.

A good-quality solar light possesses several essential features that contribute to its efficiency, durability, and effectiveness. Much in the same way that a local authority wouldn’t buy a bench from a highstreet DIY shop, choosing the right commercial grade solar light, from a trusted supplier, is essential.

Understanding the key features that make a good solar light can help dispel misconceptions and reveal the true potential of this sustainable lighting solution.

Solar panel properties

One critical aspect is a high-efficiency solar panel. Monocrystalline panels are generally more efficient, and durable compared to polycrystalline or thin-film options. A panel with high conversion efficiency can generate more power even under low sunlight conditions and should be well-protected against water, dust, and UV damage.

The right battery

Another vital component is a long-lasting battery. Lithium-ion or lithium phosphate (LiFePO4) batteries are ideal due to their extended lifespan and high energy density. The battery should have sufficient capacity to power the light throughout the night, even during cloudy weather, and support many charge-discharge cycles to ensure a long operational life.

Learn more: Do Solar Lights Work When It’s Cloudy or in Winter? >

LED specs

The light source itself should be bright and energy-efficient. The brightness is measured in lumens, and a good solar light should deliver enough lumens for its intended purpose. High-quality LEDs with a lifespan of 25,000–50,000 hours or more are essential (our innovative Solareye80 ground light, Solareye Bollard Light and Solareye Roof Light all benefit from LEDs with 100,000 hours life). In addition to lifespan, colour temperature of the LEDs is an important consideration and should suit the specific application and ecological considerations of the site.

Close up of two LED bulbs

Read more: Colour Temperature – Warm White VS Cool White Outdoor Lighting >

Read more: Responsible Outdoor Lighting – What is Responsible Lighting? >

Durability and build quality

Durability and build quality also play a significant role. Materials like stainless steel, aluminium, or durable plastic provide longevity and weather resistance. Solareye80 grounds lights are completely sealed units constructed of industrial grade polycarbonate which have been pressure tested to 55 tonnes. Solareye Bollard Lights are constructed of industrial grade polycarbonate and aluminium. In addition, both ground light and bollard light are certified IK10 for impact protection meaning they can withstand up to 20 joules of impact energy. This is equivalent to the impact of a 5 kg mass being dropped from a height of 400 mm above the surface of the product.

A solar light should also have an IP (Ingress Protection) rating of at least IP65 to ensure it withstands water and dust. Solareye80 ground light and Solareye Bollard Light are IP68 rated, meaning they are dust proof and can withstand water immersion up to one meter deep for at least 30 minutes. Solareye Roof Light goes one step further and is IP69 rated which means it is capable of withstanding high temperature, high pressure water and steam.

Read more: IP68 Certified – What Does IP68 Mean? >

Effective sensors

Effective light sensors and in some instances motion detection systems can be highly beneficial. A good solar light should include a reliable dusk-to-dawn sensor for automatic operation, and a good quality motion sensor can dramatically improve performance by conserving energy for consumption only when it’s needed.

Read more: How Do Motion Sensors on Solar Lights Work? >

Runtime and charging time

Runtime and charging time are key performance factors. A high-quality solar light should provide 8–12 hours of illumination after a full charge, with the battery fully charging within 6–8 hours of sunlight.

Warranty and customer support

Additionally, a reliable warranty of one to two years or more, coupled with good customer support, demonstrates confidence in the product’s quality.

Now that we’ve explored the key features that define a high-quality solar light, you might be wondering how these lights perform in less-than-ideal conditions. One common question is whether solar lights can still charge and function effectively without direct sunlight. Let’s delve into the possibilities and alternative charging methods that keep solar lights running, even on cloudy days or in shaded areas.

Is it possible to charge solar lights without sunlight?

Yes, it is possible to charge solar lights without direct sunlight, although the efficiency will most likely be reduced. Here are some alternative methods to charge solar lights in the absence of sunlight:

Ambient light

Solar panels can capture ambient light from overcast skies, cloudy days, or shaded areas. While the charging efficiency is lower, solar lights can still absorb enough energy to function, especially if the panel is of high quality.

Indirect sunlight

Even if the solar panel is not in direct sunlight, it can still charge using indirect sunlight reflected off surfaces like walls, windows, or water. Solareye80 ground lights are designed with multi-functional dimples in the surface of the light, these not only provide a slip/skid-resistant surface to ensure pedestrian and cyclist safety, but they also serve to redirect indirect light towards the solar panel to aid charging.

solar ground light installed in pathway

 

Tips for maximising charging without sunlight:

  • Clean the solar panel to remove dirt or debris, ensuring it captures as much light as possible.
  • Position the solar panel near a bright artificial light source or where it can receive reflected natural light.
  • Use energy-efficient settings on your solar light to extend its runtime with limited charging.

Read more: Should I Clean My Solar Lights? >

While charging solar lights without sunlight is feasible, their performance and runtime will be better when they are exposed to direct sunlight.

Commercial grade solar lights from Solareye

To find out more about our range of high quality solar powered lights and how they can provide long-lasting illumination while being eco-friendly and cost-effective, simply get in touch. Our team of experts can answer questions, offer advice and give guidance on the use of outdoor solar lighting.