10% Discount on ALL ORDERS over £75. Enter code MAR23 at the Basket. Valid for a limited time.

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 £1.45 inc VAT In stock

Perspex Price Promise Found a cheaper price? Call us on 01206638056 to see if we can beat it!

The thickness of the material listed in mm.
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.
Should the sides i.e. the cut edges be polished?
Choose the number and positions of the holes you require.

From £1.45 inc VAT


Perspex Price Promise Found a cheaper price? Call us on 01206638056 to see if we can beat it!

Product description

Perspex Opal 1TL2 is part of the Perspex Spectrum range, using perspex cast acrylic sheet formulated specifically to optimize performance when used with LED lighting.

Key features:

  • Even diffusion of LED lighting
  • Elimination of 'hotspots' caused by individual LED diodes
  • Supplied in diameters up to 2030mm
  • Available in 3mm and 5mm thicknesses
  • Opal (off-white) gloss finish
  • Lightweight
  • Recyclable

Typical applications:

  • Replacement diffusers for downlights
  • Office lighting
  • Exterior lighting
  • Retail lighting
  • Signage
  • Light box systems

Elimination of hotspots

Unlike standard light diffusing materials, Led diffusing material ensures light from individual LED diodes are not visible ‘hotspots’. Light is diffused and dispersed throughout the material displaying light evenly.

Disc size/diameters available

Discs are available in diameters up to 2030mm.

Thicknesses available

3mm and 5mm


Without a light source the discs are opal (off-white) in colour with a slight gloss surface finish. The temperature of the light when lit is dependent on the light source.


Acrylic light diffusing materials are fully recyclable.

Maximum diameter2030mm
Available thicknesses3mm, 5mm
Material reference codeSpectrum Opal 1TL2
Light transmission48%
Manufacturers thickness tolerance+/- 10% plus 0.4mm (e.g. 5mm sheet could vary from 4.1mm to 5.9mm)
ColourOpal (off-white/milky)
FinishGloss on both sides
Protective filmMaterial is supplied with protective film on both sides

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.


Are discounts available on large quantities of discs?

We offer substantial discounts on large quantities of discs, as shown in the list below:

  • 50 or more: 10% discount
  • 100 or more: 25% discount
  • 250 or more: 40% discount
  • 1000 or more: 60% discount

The discounted price will be displayed once added to your basket. If you require more than 2000 discs please contact us so that we can provide a tailored quote.

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.


Used to replace the lenses on hard to find 1967 ford galaxie 500 rear pillar interior lights. Original lenses were all faded and yellow. Not a perfect fit of course, the originals had a thin edge to clip into place, but with these secured with some adhesive they look spot on.

Product arrived exactly as described, quickly and efficiently.

Item was exactly as advertised with quick delivery and well packaged

I purchased the 3mm and it was great as an insert to an otherwise very focussed bathroom spotlight, very pleased. Quick service too as always.

SGR used the opal discs to help diffuse some rgb led down lighters. We needed a balance of diffusion with the need to Colourwash the wall at the same time. The opal discs provided by simply plastics were perfect for the job. We received our discs very quickly after placing the order.

Product used to reduce light emission from overly bright LEDs - worked well

I had fitted two Led spot lights ether side of a sign. I had expected the spot lights to illuminate the whole sign on both sides. When powered up the lighten area was just in the centre of the sign and no use at all. I measured the diameter of the spot lights and ordered 5mm thick by 41mm diameter. When they were delivered two days later I couldn’t believe how good they were and defused the spots to cover the whole sign on both sides. I couldn’t recommend this company or product enough. I was very happy and impressed with the quality and service.

I recently built a small dressing area and rather than a conventional mirror with lights my wife wanted adjustable spots. We used some ikea white temp changing GU10s which work well but are very intense at close range. These 50mm x 3mm discs were perfect diffusers and have made all the difference. They spread the light well and remove the intensity of a direct LED. Perfect fit in-front of a GU10 and would not hesitate to buy again if I put spots in the ceiling as it gives a nicer appearance than clear glass with LEDs behind.

Light diffuser - superb quality and diameter exactly as ordered. Bought a light shade and added the diffuser to hide the bulb holder and bulb. Works perfectly and gives a classy light shade.

I bought these to cover an LED lamp that was shining right into my eyes. These softened the glare but still let the light through. Exactly what I needed.

I bought 3 acrylic discs, 3mm thick, and used them to diffuse the light from 3 single LED ceiling lights. The lights gave a very bright focussed light, but left much of the room in shadow. Adding the diffusers, which were drilled and countersunk, made a huge difference. The light is softer and far more pleasant, and no more shadow areas. They were very easy to fix with 3 screws each into the ceiling, leaving a small gap between the light and the disc to avoid any danger of overheating. Very pleased!

I used these diffusers to replace the one supplied as standard and the improvement was impressive. I wouldn't hesitate in recommending these products to anyone.

Very good and quick service thank you.

Excellent product and excellent customer service .. query was dealt with very promptly. Would use again and recommend to others.

Great quality product, used to diffuse two ceiling lights. Delivered promptly and fit perfectly. Very pleased and would definitely recommend.

Wanted to diffuse the LED lighting on my microscope for photography. I wanted softer white light to avoid bright spots on highly reflective small insects. Seems to work well without producing colour casts.

Superb White Opaque Disc. Precision Cut & Drilled. Rapid Delivery & well Packed!! Excellent Service! Used as a "Light Diffuser" Attached to a Vintage French Ceiling Lampshade of Opaline Glass with a Bronze Rim, beneath it to soften the bulb glare. Works Perfectly!!! Thank You

Ordered some diffusers for my living room and hallway lighting. Very quick delivery and in excellent quality with the exact measurement specified. Fitted my light shades with ease. Will definitely use Simply Plastics again for any future orders.

Bought two light diffusers. Cut to order. Worked perfectly to soften the light from LED spotlights and fit perfectly. Great service.

I used this to replace the diffuser base in a pendent lamp shade that got broken, It not only worked very well, but was actually better than the one it replaced.

Lens for reversing lights on a classic car. They proved to be ideal to diffuse the light.

Used on downlights to make them less dazzling. Worked well.

Great replacement for a broken glass lens, speed of delivery and service was outstanding. Many thanks.

Excellent interface for ordering. Product turned up in perfect condition - well wrapped. Overall, I was stunned at the quality, ease and service. Saved me buying a new light, after all.

Exactly what was needed to diffuse my kitchen lights

Used to diffuse the light from a 5 point LED light inside a stained glass display box. Worked perfectly, dispersing the light uniformly.

I used the product to restore an Art Deco style table lamp. One of those jobs I’ve been intending to do for some time. The lamp had a glass diffusion disk to create a silhouette and this had been broken. I found Simply Plastics during an online search for a replacement and thought the product would be an ideal replacement. Very easy ordering to size and although a service for hole drilling is available, I was confident I could drill the plastic which I did easily using a template. Excellent service and quick delivery of a well packaged product. I highly recommend Simply Plastics.

I used this to soften let ceiling inset spot lights, fixed the disc onto the led lens with double sided tape. works well.

Quick and prompt delivery, diffuser works great with my lamp and perfect fit

I needed to replace a cracked diffuser in a ceiling downlighter. The one I ordered was 3mm thick but the fitting needed a thinner one. However after sourcing some longer threaded screws I was able to re assemble the unit and the repair is fine.

excellent product ,speedy service

Used it to diffuse smart downlights within my bedroom to create a natural lighting effect.

Just as it 'says on the tin'

Used on some LED uplighters which were very bright when looked at directly. The diffusers are a perfect solution and arrived swiftly and carefully packaged.

Perfect fit

I brought these to reduce the glare on some existing colour changing led lamps in a gym I was sceptical at first but they were a perfect size and fit for MR16 fittings Very high quality and finish and speedy delivery , would certainly buy again Electrical Contracts Manager TEI Electrical

Unfortunately I managed to crack the Perspex diffuser that covered one of the lights in my motorhome. Finding simplyplastics online I thought it was a reasonable price and if it didn’t fit then not too much lost. I measured twice then had someone else to check. I uploaded my request and waited. Fingers crossed. EXCELLENT SERVICE. The diffuser is a perfect fit. Thank you

The led diffuser was perfect for my application. It was cut and drilled accurately and was delivered on time. I will be buying this product again, thank you

to make an intermediate lens for a microscope for the purpose of diffusing the light and eliminating the hotspot from a halogen lamp.