Lighting without a power grid: This is how you can still bring light into the dark

Celebrating outdoors? As soon as it gets dark, there is no light and there is no normal power connection nearby. Whether it's an Easter celebration in the garden, the first barbecue party of the year or a spontaneous meeting in the park - nothing works without light! We then become aware of this in a very impressive way.

However, the motivation for researching this topic came from a completely different place. In times of uncertain energy supply due to wars, scarcer energy resources and rising electricity prices, I thought about how you can operate your consumers such as lights and the like independently of the power grid. 

This guide shows how to Solar, rechargeable batteries, batteries and power stations create atmospheric and at the same time practical lighting - completely without classic Power plug!

The focus is on efficient LED technology because it combines very low energy consumption with high luminous efficacy. There are also concrete guideline values ​​for lumens, lux and watts as well as calculation examples for running times so that parties and celebrations can be planned realistically.

 

The basics: brightness, lumens, lux and watts

What do lumens and lux mean?

Lumens (lm) describes how much light a source emits - the more lumens, the more light output. Lux (lx) indicates how much light actually reaches a surface. 1 lux is 1 lumen per square meter. For interiors, around 300 lux is considered comfortable basic lighting, while 10 to 50 lux is sufficient as muted feel-good light or orientation light.

You need significantly less lux outdoors than indoors because the eye perceives darkness outside differently. For a terrace, the recommended values ​​are around 150 lux at the seating area, while for paths, trees and decorations, 10 to 50 lux is often enough to create a cozy atmosphere and still be able to walk safely.

 

Why LEDs are unbeatable

Watts (W) describes the electrical power consumed, but says nothing about the brightness without context; What matters is how efficiently these watts are converted into lumens. Modern LED lights Power consumption is often only between 3 and 10 watts, whereas older light chains with incandescent lamps quickly require 300 watts and more. For a very classic LED light chain with around 8 watts of power consumption, if used for several hours over a period of weeks, the power consumption is just over 1 kWh, while a comparable chain with incandescent lamps requires around six times as much.

In Outdoor area This high efficiency means: With the same battery capacity or power station, LEDs run many times longer than halogen or incandescent lamps. That's why almost all mobile garden, balcony and camping lamps are now LED-based - regardless of whether they are solar lights, battery-powered lanterns or LED spotlights on the power station.

 

Solution 1: Solar lighting

Solar lights have a small solar panel and an integrated battery that is charged by sunlight during the day and powers the LED in the dark. Many models have twilight sensors and switch on automatically as soon as it gets dark. This is particularly practical in the garden, on the terrace or in the garden.

Because they are completely independent of the power grid, solar lights are ideal when there is no permanent connection available or cables would get in the way. are popular Solar bollard lights for way marking, Solar fairy lights on pergolas and trees as well as small ones Solar spots for lighting beds and decorative elements. The lights are practically free of operating costs because the energy comes from the sun. The only costs are the purchase and, if necessary, a battery replacement after years.

However, solar lighting also has limitations. The luminosity depends directly on the intensity of the sun and the charging time during the day. On cloudy days or in winter, the brightness drops significantly. Cheap products often rely on small, weak panels and simple batteries, which leads to a shorter light life.

For a one-off celebration or an event that can be planned, it therefore makes sense to consider solar only as a basic component and, if necessary, supplement it with a battery or power station light in order to reliably have enough brightness.

Solution 2: Battery lights and battery-operated lamps

Mobile battery-powered lights have integrated batteries that are usually charged via a USB cable (e.g. on a charger, power bank or power station). Many models are specially designed for outdoor use, with splash-proof housings and warm white LEDs for pleasant light.

Battery lights with LEDs usually last up to 20 hours per charge before they need to be charged again. This makes them ideal for a whole evening on the balcony or terrace if you load up in time before the celebration.

In addition to integrated batteries, battery-operated fairy lights are also common for outdoor use. Due to the very low consumption of LEDs - often only a few watts for a complete chain - high-quality alkaline batteries last for many hours or even several evenings.

A practical example: An LED light chain with around 200 diodes has a total consumption of around 15 watts. This would mean that it would consume just over 1 kWh of energy in three days of burning time. Broken down into smaller battery-operated chains with 20 LEDs, the outputs are often in the range of 4 watts or less, resulting in very, very long running times. 

This makes these lights ideal for temporary events such as summer parties, picnics or the Easter weekend on the meadow. Thanks to LED technology, they have low power consumption and long runtimes.

Solution 3: Power stations + LED lights

Portable power stations are large batteries with integrated inverters that provide classic 230-volt sockets, USB and 12-volt outputs. The capacity of such devices is measured in watt-hours (Wh) and ranges from around 300 Wh for compact camping models to over 3000 Wh for extensive outdoor or emergency power applications.

A 300 Wh power station is usually recommended for weekend trips or camping, while models with 1000+ Wh and more enable longer self-sufficient times and the operation of multiple devices in parallel. Modern power stations often rely on long-lasting LiFePO4 batteries with several thousand charging cycles, making them a sustainable solution.

LED fairy lights for indoor and outdoor use typically have a power consumption of between 3 and 10 watts. If you take an energy-efficient chain with 5 watts and run it on a 300 Wh power station, the theoretical running time is around 50 hours.

Anyone who needs bright work light for grilling, cooking or setting up often uses LED spotlights in the 10 to 30 watt range. A 20 watt LED spotlight on a 300 Wh power station runs according to the above. Formula around 10 to 12 hours.

In practice, you combine several small consumers: fairy lights (e.g. 2 × 5 watts), a workplace spotlight (20 watts) and possibly a USB lantern (5 watts). Even with a total load of 35 watts, a small 300 Wh power station would still last around 7 hours.

For a garden or park party with several fairy lights, a barbecue area spotlight and music, a power station in the 300 to 1000 Wh class is often the most convenient solution.

Concrete setups for gardens, balconies and parks

Setup 1: On the balcony

A typical balcony needs mood lighting rather than very bright light. The following components are available for this:

• One or two solar fairy lights along the railing or balcony railing to set the mood
• A mobile battery-powered table lamp (warm white, 300-500 lumens) as the main light source at the table
• Optionally a few lanterns or small candles on the table for additional, warm accent light

The solar fairy lights automatically provide light from dusk when the sun is pre-charged, while the battery-powered table lamp lasts an entire evening with a runtime of up to 20 hours. This creates a cozy atmosphere without a single power cable on the balcony.

 

Setup 2: Barbecue party in your own garden without an outside socket

For a garden party with several guests, you need more light zones: seating area, barbecue area, paths and possibly a children's area. A practical set could look like this:

• 2-3 solar bollard lights or solar ground spots for path marking, which switch on automatically at dusk
• 1-2 longer LED light chains (e.g. 5 watts each) along a pergola, between trees or around the terrace
• An LED spotlight (approx. 20 watts) for the grill area, operated on a 300 to 500 Wh power station
• Several mobile battery-powered lanterns that provide warm additional light on tables or walls

If you assume for the calculation two fairy lights of 5 watts each, a 20 watt spotlight and two battery-powered lanterns of 5 watts each in mains operation, the total output is around 40 watts. A 300 Wh power station could power this load for around 6 to 7 hours, taking into account an efficiency factor of 0.85 - enough for an entire evening.

 

Setup 3: Picnic or Easter party in the park

In public parks or open spaces there are usually neither sockets nor permanently installed lights available. For legal reasons, open fires are often only permitted to a limited extent, which is why technical solutions and closed lanterns have an advantage.

A mobile setup could include:

• A compact power station (300 Wh) in the backpack for fairy lights and possibly a small music system
• 1-2 LED fairy lights (5 watts) to decorate a gazebo or makeshift tent
• Several USB-powered LED lamps or battery-powered lanterns for the picnic blanket and dining area
• Optional individual battery-operated fairy lights, for example in trees or in the tent.

Even if the entire setup draws 30 watts, a 300 Wh power station is enough for an evening of several hours; Combined with battery-powered lights that run independently, a very flexible overall system is created. This way you can create an oasis of light even in complete isolation.

Conclusion

Lighting without the usual mains power is no longer a problem today - on the contrary, the combination of efficient LED technology and flexible energy sources opens up completely new possibilities for atmospheric outdoor settings. Solar lights provide permanent, free basic lighting, rechargeable and battery-operated lamps bring spontaneous light to any location, and power stations make it possible to operate several strong light sources and other devices in parallel.

Due to the extremely low energy consumption of LEDs - around 3 to 10 watts for many fairy lights and hundreds of lumens for small outdoor lights - islands of light can be created for hours or even days with comparatively small battery capacities. If you know the basic relationships between lumens, lux, watts and running time and plan your celebration accordingly, you can transform your garden, balcony or park into a glamorous stage - without any classic Power plug.