Instant prices on cut to size perspex
Cut to size prices
Outstanding customer service
Customer service
Free fast delivery on all plastic sheet
On orders over £150
30+ years experience in the plastics industry
Experience with plastics
From £1.20 inc VAT In stock

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The thickness of the material listed in mm.
The length of the required material, stated in mm. PLEASE NOTE: We only cut material in mm, so please ensure any conversion from inches to millimeters is correct.
The width of the required material, stated in mm. PLEASE NOTE: We only cut material in mm, so please ensure any conversion from inches to millimeters is correct.
The radius for each corner.
Should the sides i.e. the cut edges be polished?
Choose the number and positions of the holes you require.

From £1.20 inc VAT


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(3mm) LED Light Diffusing Opal Acrylic Sample

Thickness: 3mm

Length: 100mm

Width: 100mm

Radius: None

Polished: Yes

£2.10 inc VAT

(5mm) LED Light Diffusing Opal Acrylic Sample

Thickness: 5mm

Length: 100mm

Width: 100mm

Radius: None

Polished: Yes

£3.00 inc VAT

Product description

LED Light diffusing opal acrylic sheet is produced specifically for the use of LED lighting systems. Light is diffused evenly throughout the sheet unlike standard opal acrylic sheet that can suffer from hotspots of light caused by individual diodes.

Key features:

  • Even diffusion of LED lighting
  • White/Opal colour finish
  • Hard wearing
  • Weather resistant
  • Suitable for forming
  • Environmentally friendly
  • Economical
  • Suitable for both indoor and outdoor use
  • Create different colour finishes by using different colour bulbs

Typical applications:

  • Light box signage systems
  • Illuminated signs and graphic display
  • Light fittings
  • Lighting lenses
  • Ceiling lighting tiles

Further detail:

Even light diffusion

Unlike standard opal acrylic sheet, LED opal light diffusing sheet diffuses light evenly throughout the material without suffering from hot spots caused by individual LED lights.


LED lighting is more economical to run than more traditional florescent bulb lighting sources. The LED specific sheet we offer has proved through testing that it is the best performing not only in terms of light diffusion and transmission but also in terms of economy of running costs. Fewer LEDs are required using less energy at lower voltage.

Environmentally friendly

LED lighting technology is far more efficient than more traditional lighting systems. Using less energy at very low voltage, LEDs create a safe system with little maintenance and long life. All of which produce a more environmentally conscious choice for lit signage systems.

Flexibility in coloured lighting

LED opal acrylic sheet offers creative flexibility by being able to be lit with different colour LED lighting. Coloured light is transmitted brightly and diffused evenly.

Maximum sheet size3050mm x 2030mm
Available thicknesses3mm, 5mm
Material ref codeSpectrum 1TL2
Light transmission48%
Manufacturers thickness tolerance+/- 10 % plus 0.4mm (e.g. 5mm cast sheet could vary from 4.1mm to 5.9mm)
Gloss finishGloss finish on both sides
Protective filmMaterial supplied with protective film on both sides
Fire ratingUK class 3 fire rating

We currently deliver to the UK and throughout Europe. Delivery charges are calculated based on the longest side of the material ordered. Only one delivery charge is applicable per order regardless of how many items are ordered.

Longest side Orders under £150 (inc VAT) Orders over £150 (inc VAT) Express Delivery
Samples £2.95 FREE £9.95
Less than 500mm £5.95 FREE £12.95
500mm to 1999mm £9.95 FREE £14.95
2000mm or greater £14.95 FREE £24.95
Sneeze Guards (All sizes) £9.95 FREE £14.95

Europe (7-10 working days)

Delivery guidelines
We process and dispatch all orders as quickly as possible - our delivery guidelines are as below:

  • Standard delivery (3-5 working days)
  • Express delivery (2-3 working days)

Express Delivery
If you require faster delivery you may wish to consider choosing our Express Delivery option at the checkout. Express Delivery orders will be prioritised and will be delivered using a recognised nationwide courier.

Next Day Delivery
Next Day delivery is not available via our website due to the quantity of orders we receive on a daily basis. However, if you need to place an order and require Next Day delivery please contact us – we will make every effort to meet your requirements and deadlines.

Collection is available from our location in Colchester, Essex (see full address). When placing an order on our website there is an option on the final stage of the checkout for Collection/pickup. Once your order is ready for collection you will be notified via email.

Due to the nature of the ”made to measure” products we supply, we provide delivery prices at a standard rate and reserve the right to cancel an order should it become economically unviable to fulfil the order. In these rare circumstances the customer will be contacted first to discuss alternative options.

When delivering to some delivery locations we can incur increased shipping costs, if this is likely to happen the customer will be contacted to discuss any possible extra delivery charges required.

Examples of delivery locations which may require additional delivery charges are,

  • Channel Islands
  • Scottish Islands
  • Isle of Man
  • Isles of Scilly
  • Remote areas
  • Northern Ireland

If you require delivery to one of these areas please get in touch to discuss your order.

You may also wish to read more detailed information regarding our terms and conditions in relation to delivery.


Will I be notified when my order is out for delivery?

Yes. Simply Plastics will send you an email when your order has been dispatched. If your shipment is trackable the email will contain tracking details and a link to the delivery couriers website, where you can track the progress of the shipment.

I need my order urgently, can I pay for faster shipping?

Yes. We offer an express delivery service which aims to deliver all orders in 1-3 working days. Orders are delivered by a recognised courier company and may require a signature on delivery.

Can I collect my order from Simply Plastics?

Yes, of course. At the final stage of the checkout process there is a delivery option labelled "Collection/pickup" which is free. When your order is ready for collection you will receive an email to notify you, which includes our opening times and address.

Collection -example

Can Simply Plastics help me with a fabrication project?

Yes we can. Customised, cut-to-size materials can be ordered directly through the website, but if you require further fabrication we can help you with this too.

Our fabrication services include,

  • CNC routing
  • Bending
  • Shaping
  • Bonding/glueing
  • Diamond polishing
  • Flame polishing
  • Intricate laser cutting

Examples of fabricated products include,

  • Acrylic display cases
  • Point of sale 
  • Retail display
  • Lighting applications
  • Brochure holders
  • 2D/3D Acrylic lettering
  • Furniture
  • Office Interiors

For enquiries regarding any project from prototypes to large production runs, please get in touch to discuss your requirements.


I used these in my gaming room, they worked perfectly to diffuse the custom LED panels I made to fit inside my console display shelving. Fantastic product, great price, awesome service. Thank you!

I bought 2 frosted sheets and sandwiched a big LED matrix between then. The effect is exactly what I wanted. Thanks very much! Here's a very quick demo:

I bought this product for lighting for discos and it’s absolutely spot on. Was originally unsure on what type of sheeting to go for but was very kindly guided in the right direction and told which would suit my use best. Very pleased with the outcome of how it looks, is good quality and exactly how I’d hoped.

Used to diffuse LEDs in a DIY light box for a stained window we salvaged. Some LED's are still visible in the lighter coloured glass even on a dimmed setting. Nothing wrong with the opal acrylic sheet and we are generally happy with the effect. However maybe the lights needed to be further away from the plastic (we were only able to separate it by about 10mm in the space we had available - just a large picture frame) or perhaps a thicker sheet might have been more successful. We used the 3mm thickness which we thought would be enough.

Measurements and cutting to shape. Extremely satisfying 🌟

Product was used to diffuse light in an illumination product prototype and worked ok.

Used as a diffuser for a bespoke light. More than the trick.

Used as part of a DIY slide copier. Perfect for the job.

Great Product

Did what it said! Diffused a slightly too bright led cornice light strip

the opal acrylic sheets certainly for an even diffused light with both led and the older lcd It also helps with producing an even light for astrophotography creating the calibration frames very accurately cut to size and very good quality

Had some recesses in a stone wall and turned them in to a lighting fixture the panels came quick and look great

I used an approx. 400 mm by 500 mm sheet (5 mm thick) to diffuse the light from a flashgun to illuminate objects from behind. In this respect it is not perfect, but pretty good. With the flashgun behind the light transmitted is not uniform, but good enough for photographic purposes. It is quite rigid, and this helps with getting things placed -- I used wooden runners with a slot on top.

The product was used for a light. The diffusion is great. You must make sure that any LED strips are close enough so they cant be seen. Recommend no more than about 4 CM between strips.

Used as a diffuser for Philips Hue Amarant on a fitness stage. Perfectly finished product.

First class service and a first class product. All items cut perfectly to size. Many thanks

We purchased this product to replace broken glasswares in an expensive LED bathroom fitting which was no longer available and had to match others. We therefore replace the glasswares in all fittings to match. The parts arrived exactly as per our spec and fitted perfectly and worked excellently in diffusing the lighting output - they looked better than with the original opal glass. The order arrived promptly and in line with despatch details quoted when placing order (very unusual these days) Would definitely use this company again.

I used this LED light diffusing acrylic to ensure even lighting on a photographic lightbox I made using very bright LEDs for the light source. After adjusting the distance between the acrylic sheet and the LEDs I managed to achieve very good results with no LED bright spots.

Great product nicely cut and polished. Used it to make a lighted bottle stand for my garden bar. Light transmission lovely and even as required. I highly recommend Simply Plastics and will use again.

Perfect for replacing a piece of broken piece flashed opal glass in an uplighter. Safe and easy to drill. Excellent customer service, too.

I purchased some led light units for my touring caravan and they came without defusers so I used cut to size 3mm plastic to fit as defusers, worked very well.

Backlit panel for a Xmas window display. Cut to size perfectly, rapid turnaround, carefully packed. Delivered exactly what I wanted.

Used for defusing led lights

I bought the LED diffuser to fit a length of recessed lighting that I had installed. The diffuser was not in my original plan, but the LEDs had too much glare, so the diffuser was a retro-fit. I works fantastic, and gives an even light which a great improvement. The diffuser was the exact size that I ordered, and it arrived in good time and was very well packaged, giving full protection from any damage. I'm very pleased with my purchase and with Simply Plastics.

As described and cut to exact size as requested. Wrapped well for transport. Very happy with this product

Used to finish a light box I made,to up-light a small work of art. Was quickly supplied exactly to required size, I'd use this Company again should the need ever arise.

I used it on a bathroom cabinet. My orders are allways cut perfectly to size. The orders are so well packed. I recomend simplyplastics to all my friends.

Came as expected. Very fragile though if you are making holes in it. So just be careful. It could crack.

The product was suitable for diffusing an LED light.I made a Lamp box using 35 watt photographic LED ,and the diffuser was a slide in front panel.

This acrylic sheet was perfect: dimensions were absolutely precise and arrived quickly. I’m using this stuff to make light boxes to display stained glass panels: despite being only 75cm in front of an LED light source, the material provides very even illumination.

I used this product in a handmade light box incorporating leaded stain glass to diffuse the light source. They were very successful.

Led profiler. It was great, easy to handle and cut, not brittle sanded well.

Bought to cut into strips to act as led profiler after sanding to a satin finish. Works great, was easy to cut and not brittle. Happy to use this store agian.

Product packaged with great care, and delivered on time.Hope now my stained glass presentation with said panels are a success. Many thanks.

Made a stepped box for bottles on backbar of public house with lights in. The quality of the light diffusing plastic was top quality the finished product gets lots of compliments. Would recommend your company.

We ordered this LED Light Diffusing Opal Acrylic Sheet cut to size for use in a light box for some stained glass artwork. The sheets were cut quickly and accurately and were dispatched promptly. When they arrived they were well packaged and exactly as per the specification. The product performs brilliantly for the light box application we needed it for - the level of light diffusion is perfect for this concept. I would recommend this product to anyone making a light box. Thanks Simply Plastics!

The plastic did the job well, I used it to diffuse led strip lights.

Using this for diffusing coloured led's. It is very effective! There was a problem with one of my orders but they resolved it within a few days. The service is good and the customisation is good.

Product bought to replace a broken diffuser plate

Used as an LED diffuser in a home made table lamp and to diffuse LED lights in a homemade Christmas decoration. Both worked extremely well but I did break one piece when bending a narrow strip around the inside of a 300mm radius. Lessen learned, but I will use this material again and will use Simply Plastics as my supplier since the price, delivery and product quality were excellent.

I needed a single, small sheet of Opal Acrylic Sheet as I was building a light box so I could use my digital camera to digitise film negatives and slides. I put in the dimensions I needed, got the online quote, put in the order and it was all turned around really fast. Another firm I'd approached wanted to slap a £25.00 "small order" fee on top which would have meant giving up on the project. The acrylic sheet was cut perfectly and works incredibly well. I'm in the process of making high-quality digital copies of the films now and will hopefully make a book of them in future. Thanks again, Simply Plastics, you've been simply brilliant! Tim

Excellent product. Excellent service. Highly recommended!

Purshased as a diffusion screen for a 1950s large format photographic enlarger. Works perfectly.

Excellent fast service from simply plastics.

Does exactly what we wanted. Spot on!

Perfect. High quality and exactly what I needed. Cut exactly to my specifications. Delivery was timely and convenient. Thanks!

Interior lights in camper van - built frame over mulit change led strips and used the acrylic to cover. In some places the acrylic is very close to the lights and you can still see the individual lights but as long as theres a couple inch gap it works really well. Slight colour distortion but overall very happy. Great value

Cutting of Pieces done with high precision - Delivery very quick. Pleasure dealing with these guys!!!!!

Used to build my own linear LED light strip and diffuse the light. Fantastic quality and service

smooths out lighting very beautiful <3

Very impressed with the material, I am slowly changing my house lighting to LED. This has been my first room. I didn't want up lighting so I have been looking for a diffuser I could use around the perimeter of the ceiling instead of coving. I was abit dubious about how flat plastic at a 45 degree angle would look. But it actually is quite nice. No central light, so when the lights are off it looks like there is no light source in the room, when they are on the room has the best lighting in the house. Just how I wanted it.