String Lights
Flexible string lights work particularly well for outlining window frames, creating simple shapes or adding a gentle glow around the glass.

Hanging lights in a window for Christmas brightens your home and spreads festive cheer both inside and outside.
With the right lights, suitable fixings and a little planning, you can create a beautiful Christmas window display without unnecessarily damaging your window frames.
Start by choosing lights suitable for your window, then measure the space and plan where the lights will hang.
Removable adhesive hooks, suitable suction cup hooks and purpose-made light clips can help you position lightweight Christmas lights without drilling into the window frame.
Test the lights before installation, keep cables clear of opening windows and make sure the display does not interfere with curtains, blinds or the normal operation of the window.
Start by selecting lights that suit your window size and the festive look you want to create.
Flexible string lights work particularly well for outlining window frames, creating simple shapes or adding a gentle glow around the glass.
Curtain lights create a cascading effect with multiple vertical strands hanging from a horizontal cable. They are particularly effective across wider windows.
How to hang Christmas curtain lightsLED strips can create a clean, modern outline around a window. Check that the fixing method is suitable for the surface before applying adhesive strips.
Icicle lights create a wintry, sparkling effect and can look particularly attractive when hung neatly across the upper part of a window.
Before hanging your lights, measure your window to determine how many strands or panels you need.
Think about the overall appearance you want to create and where the lights will be supported.
Arrange string lights around the window to create a glowing frame. This works particularly well with warm white lights.
Arrange lights in vertical rows to create a cascading display across the window.
Arrange suitable lightweight lights into Christmas trees, stars or other festive shapes within the window opening.
Suitable adhesive hooks can support lightweight Christmas lights on compatible window surrounds or nearby walls.
Check the manufacturer's instructions before using them on painted or uPVC surfaces, as some adhesives can leave marks or residue.
Suction cup hooks can attach directly to suitable smooth glass surfaces, making them useful for lightweight window displays.
Ensure the glass is clean and dry, and check that each hook is suitable for the weight it will support.
Christmas light clips can help keep strands evenly spaced and prevent them from hanging loosely.
Choose clips compatible with the surface and avoid drilling or screwing into your window frames.
Carefully untangle each strand or panel so that it is easier to position the lights evenly.
Test the lights before installation to confirm they are working. Inspect the cable, plug and bulbs for signs of damage.
Do not use a set with damaged wiring or broken electrical components. Unplug the lights before hanging them.
Clean and dry the glass or surrounding surface where your hooks or clips will be fitted.
Make sure the power cable can reach a suitable socket without stretching across a walkway or becoming trapped in an opening window.
Start at the top corner of the window and position your first suitable hook or clip.
Attach additional fixings according to your planned layout, keeping the spacing even.
Carefully position the lights on the hooks or clips without pulling the electrical cable tightly.
Make sure the lights do not obstruct handles, hinges, trickle vents or the normal opening and closing of the window.
Use suitable cable clips to keep loose wiring neatly positioned along a safe route towards the power supply.
Do not pull cables tightly, trap them between window frames or route them where they could be damaged.
Battery-powered lights can reduce the amount of visible wiring and offer greater flexibility when there is no convenient nearby socket.
Keep battery compartments secure and batteries out of the reach of young children.
Keep electrical lights clear of curtains and other flammable decorations, avoid overloading sockets, and only use lights outdoors if they are specifically designed for outdoor use.
Switch off and unplug your lights before going to bed or leaving the house.
For further advice, visit Electrical Safety First's Christmas lights guidance .
Lightweight snowflakes and hanging ornaments can add extra festive detail around your illuminated window.
Decorative garlands and ribbons can help frame the window and introduce colour and texture.
Keep these decorations separate from electrical wiring and light fittings.
Battery-powered LED candles, small figurines and other festive decorations can create a layered display on a suitable windowsill.
After hanging your lights, switch them on and step back to evaluate the display.
Check for uneven spacing, gaps or strands that need repositioning. Switch the lights off and unplug them before making any adjustments.
Once you are happy with the arrangement, check that the hooks remain secure and the lights do not interfere with the window, curtains or nearby furniture.
Suitable removable adhesive hooks, suction cup hooks and purpose-made clips can help support lightweight decorations without drilling. Always check that the fixing is suitable for your window surface.
Yes, provided they are designed for glass, the surface is clean and dry, and the hooks can support the weight of your lights.
Curtain lights are normally supported along the upper part of the window, allowing the individual strands to hang vertically.
You can read our dedicated guide to hanging Christmas curtain lights for more detailed instructions.
Unsuitable adhesives or permanent fixings can mark or damage certain finishes. Avoid drilling into the frame and use fixings confirmed as suitable for your particular window surface.
Do not trap electrical cables between a closing window and its frame, as this can damage the insulation and interfere with the window seals.
Explore our range of replacement windows and find designs to complement your home throughout the year.