Specifying Murano glass lighting

At a glance

Reference only. No weights, safe loads or tolerances are given: they come from the workshop, a structural engineer and the lighting designer.

What this sheet adds

We already publish three pages on Murano glass and lighting. This sheet does a different job: it is the checklist you work through while you write the specification.

• Murano glass techniques explained describes how the glass is made. This sheet says what each technique means for the drawing and the schedule.
• Murano glass chandeliers describes the range and how a commission runs. This sheet sets out the decisions in order, who confirms each one, and wording you can paste.
• Bespoke lighting: how to specify, design and install covers every type of bespoke lighting. This sheet stays with Murano glass and goes deeper on tolerances, paperwork, weight and programme.

Everything here is reference for specifiers. The glass is made by our Murano partner workshop and coordinated through the studio. Where a figure has to come from the workshop, a structural engineer or a lighting designer, we say so instead of giving one.

What to put on the drawing

A hand-made fitting is drawn before it is made, and the drawing is where the specification is won or lost. Fix the dimension set below, number each part, and have the workshop return the shop drawing with a declared weight before anything is made. Suppliers use words such as height and drop differently, so write the definition on the drawing.

The seven items and who signs them off

The definitions used on this sheet: drop is the distance from the finished ceiling to the lowest point of the fitting; overall height is from the underside of the canopy to the lowest point; overall diameter is the widest extent, and you should say whether it includes the cups and lamps. Show the finished ceiling level and the finished floor level on the same elevation so that clearances can be checked.

Glass: technique and what it means on the drawing

Most Murano glass lighting is hand-blown, with decoration built into the glass at the furnace. The technique decides the look, and it also decides what you can expect from one piece to the next. The table follows our journal guide to Murano glass techniques. The workshop confirms which techniques it can make at chandelier scale and which cannot be matched exactly.

Naming the glass: crystal is a legal category

Hand-blown Murano glass is not automatically crystal, and the word on a quote proves little. Council Directive 69/493/EEC, annex I, sets out the categories below. We read it as published on legislation.gov.uk (revised version of 2007, with no amendments applied since 31 December 2020); whether it still governs the word in Great Britain and the EU today has not been checked.

For a specification, do not rely on the word. Ask the workshop to state the glass type for each element and, where crystal is required, the category and the composition it declares.

Origin: what Murano can and cannot prove

Three words are used loosely. Murano says where and how the glass is made: blown by hand on the island in the Venetian lagoon. Venetian describes a style, and a Venetian-style chandelier can be made anywhere. Vetro Artistico Murano is a collective trademark set up under Veneto regional law no. 70 of 23 December 1994 and managed by the Consorzio Promovetro Murano. Only companies that make art glass on Murano can apply to use it.

Promovetro describes an adhesive anti-counterfeiting label on marked pieces, red or blue depending on the production method, showing the maker's identification code. Since 2016 it has also carried a serial number and a data matrix code that identify each product. The mark is about origin: it says where and how the glass was made. It does not stand in for electrical certification, and it says nothing about colour match or the workshop's acceptance criteria.

What to write: ask the workshop whether it holds the mark and, if it does not, exactly how it describes the origin of each element. Then require origin documents with delivery. Our Murano chandeliers page says documentation of Murano provenance is provided on delivery; make that a line in your specification so that it is a requirement, not a courtesy.

Colour: specify against a sample

Colour in Murano glass is mixed into the melt rather than applied to the surface, so it will not wear off. It also means every batch is its own. Specify colour against a physical sample of the actual glass, not against a name or a screen. Our product page says colour can be briefed against a reference such as RAL; how closely glass can follow a reference is for the workshop to state, colour by colour.

• Approve a sample made in the technique and thickness you intend to use. A swatch in a different technique will read differently.
• Look at it where it will hang. Check it at the colour temperature you have chosen, at full output and at the lowest dimmed level, and unlit in daylight. Glass changes character across all three.
• Keep a control piece. Both parties sign it and each holds one, so any dispute is settled against the same object.
• Ask about batches. Can every element of one colour come from the same batch, and what will the workshop do where it cannot?
• Get the colour-matching limit in writing. We have found no published tolerance for colour variation between batches of Murano glass, so any figure has to come from the workshop for your colour.
• Choose opaque or clear on purpose. Opal and opaque glass hides the lamp and holds back light. Clear glass shows the lamp and carries its colour. Decide with the lighting designer.

Handmade variation: agree it before production

Hand-made glass is not machine-made glass with flaws. Our own pages say that no two pieces are identical, and your specification should say what that means in practice. We have not found a published standard for accepting hand-blown decorative glass; standards for architectural flat glass are written for a different product. The list below is recommended project practice, not a standard, and the workshop should add its own limits.

Write the criteria down, attach reference samples, and say who inspects, where and in what light: at the workshop before dispatch (with photographs), on arrival, and after hanging.

Weight and fixing: who decides

This sheet gives no weights and no safe-load figures, on purpose. The weight of a hand-made glass fitting depends on its size, the number of arms and the thickness of the glass, and a catalogue figure is not a design value. A wrong number here is a safety matter, so the figures have to come from the workshop's drawing for your piece and from a structural engineer for your ceiling.

• The workshop declares the weight. The complete, lamped fitting, on the shop drawing, with its tolerance. Ask for it before you approve the drawing, and again as built.
• The structural engineer designs the fixing. Give them the declared weight, the position, the drop, how the piece will be lifted into place and any lowering gear. The load has to reach the structure. Do not rely on plasterboard, the ceiling finish or a standard ceiling accessory to carry a hand-made glass fitting.
• Show who is responsible for each link. Glass, frame, chain or rod, canopy, fixing, structure. The drawing above shows the chain of parts; the schedule should show the chain of responsibility.
• Settle the drop and the void early. Confirm the structural drop available and the depth of the ceiling void before the drawing is started, as our bespoke lighting guide advises.
• Plan access. Who will clean it, how lamps and driver are reached, and whether the fitting is lowered. If it is lowered, specify the gear and who maintains it. The engineer and installer will advise on the lifting rules that apply.

Lamps, dimming and drivers

Settle the lamp and dimming decisions early. The workshop builds the electrics into the frame and the glass, so a late change can mean rework. UK hospitality trade press notes that late changes to finishes, dimming protocols or mounting can force rework, and the same holds here. For the room-level view see our hotel lighting design guide.

• Light source and lamp base. Give the type, the base and the number of lamps. Ask the workshop for the maximum rating the glass and the lamp holders allow, not only what fits the socket.
• Colour temperature. Set by the lighting designer for the whole room. Check it against the glass colour sample.
• Dimming protocol. Leading edge, trailing edge, 0 to 10 V or DALI, as the room's control system requires. Have the workshop confirm in writing that the driver and light source work with it.
• Driver. Where it sits, how it is reached, and whether it can be replaced without taking the fitting apart. The Lighting Products Regulations 2021 (regulation 6) require light sources and separate control gear in containing products to be replaceable with commonly available tools unless the technical documentation gives a justification. Ask the workshop how the fitting meets this.

Certification and paperwork

gov.uk guidance (updated 21 August 2026) says the UK continues to recognise the CE marking, alongside or in place of the UKCA marking. It does not settle for you which marking a given fitting needs, so ask which marking the workshop uses and which regulations and standards its declaration of conformity names. The general luminaire safety standard is BS EN IEC 60598-1; BSI lists the 2021 edition, published 5 November 2021, as current.

Building regulations: Part L (England)

Approved Document L, Volume 2 (2021 edition incorporating 2023 amendments, for use in England) defines specialist process lighting to include art objects with integral lighting and names chandeliers as an example. Its definition of fixed building services, which covers fixed lighting systems, excludes specialist process lighting. A 2026 edition takes effect on 24 March 2027 (24 September 2027 for higher-risk building work) and keeps chandeliers in that definition. This does not take the rest of the room's lighting out of scope, and whether a particular fitting qualifies is for the lighting designer and building control to confirm. Scotland, Wales and Northern Ireland have their own documents, which we have not read.

Lead times by stage

Our pages give 14 to 18 weeks for Murano glass lighting, counted from written approval of the shop drawings and samples to delivery, and say the figure depends on the furnace schedule. UK hospitality trade press (March 2026) described about 22 weeks as the traditional norm for decorative lighting in general, which is a reminder that a number depends on what is counted and when the clock starts. Treat these as ranges, not promises: the workshop confirms the programme for each piece, including its closure periods.

What must be fixed at each stage

Where programmes slip: trade press names design freeze, stakeholder approvals and late technical redesign, such as a change of finish, dimming protocol or mounting, as the points where time is lost. Our lead times page suggests three ways to shorten a programme: decide the long-lead items early, approve samples in batches, and keep one decision-maker per package.

Questions to put to the workshop

Send these to the workshop with the brief. The answers, in writing, are what turn this checklist into a specification.

1. Do you hold the Vetro Artistico Murano mark? If not, exactly how do you describe the origin of each element?
2. Which techniques can you make at this scale, and which cannot be repeated exactly from one piece to the next?
3. What is the declared weight of the complete lamped fitting, and its tolerance?
4. What colour-matching limit do you work to for these colours, and can each colour be made from one batch?
5. What are your acceptance limits for bubbles, cords, asymmetry and marks?
6. Which lamps and drivers, what maximum rating does the glass allow, and which dimming protocols have you confirmed?
7. Can you send a sample declaration of conformity, name the test house, and say how a one-off fitting is verified?
8. How does the fitting meet the replaceability rules for light sources and control gear?
9. What is the programme by stage, including closure periods, and when is design freeze?
10. How is it packed, who is responsible for breakage in transit, and is site assembly needed?

Glass elements hand-made on the island of Murano by [workshop], in [soda-lime] glass unless stated, by the methods shown on the shop drawing: [free-blown arms, mould-blown leaves, incalmo globes]. Crystal only where stated, by category and declared composition. The workshop to state whether it holds the Vetro Artistico Murano mark and to supply label details for each piece, or a written declaration of origin, with delivery.

Colour to match the approved sample [ref], signed by [designer] and [workshop] on [date]; each keeps a control piece. Assess lit at [2700] K, at full output and fully dimmed. One batch per colour where possible; the workshop to list any that cannot. Colour-matching limit: [stated by the workshop]. Handmade variation (small bubbles, cords, slight asymmetry, ground pontil marks) accepted within the criteria agreed before production [ref]. Chips, cracks, sharp edges and loose joints not accepted.

Drop [ ] mm from finished ceiling to lowest point; overall height [ ] mm from underside of canopy to lowest point; overall diameter [ ] mm at widest point [including cups and lamps]. The workshop to declare the complete lamped weight, with tolerance, before the drawing is approved. Structural engineer [name] to design the fixing to the structure for that weight and approve it before production release. No load on the ceiling finish, plasterboard or a standard ceiling accessory. Lowering gear, if any: [type], maintained by [ ].

Luminaire to comply with BS EN IEC 60598-1 and its applicable parts. Light source [type], lamp base [ ], [number] lamps, [2700] K, maximum rating per lamp holder [stated by the workshop for the glass]. Dimming [trailing-edge / 0 to 10 V / DALI] to suit [control system], compatibility confirmed in writing. Driver at [ ], reachable without dismantling the fitting. Light sources and control gear replaceable with commonly available tools, or the technical justification supplied.

With each fitting: declaration of conformity naming the regulations and standards applied; test report and test house; rating plate details; installation, re-lamping and cleaning instructions; lamp and driver data sheets; origin documents. Electrical contractor to certify the installation to BS 7671 [edition in force]. Programme counted from written approval of shop drawings and samples; the workshop to issue a stage programme with design freeze [date], closure periods and delivery [date]. Changes after design freeze may change programme and cost. Packing, arrival inspection and responsibility for breakage in transit: [ ].

Standards and sources

• BS EN IEC 60598-1:2021, Luminaires: general requirements and tests: BSI listing: published 5 Nov 2021. Clauses not read.
• Approved Document L Vol 2 (England), 2021 edition: Appendix A names chandeliers. 2026 edition from 24 Mar 2027.
• SI 2021/1095, Lighting Products Regulations 2021: Regulation 6: replaceable light sources and control gear.
• Council Directive 69/493/EEC, annex I: Crystal categories, legislation.gov.uk, 2007 revision.
• gov.uk: Using the UKCA marking: Read 5 Nov 2026; page updated 21 Aug 2026.
• Consorzio Promovetro Murano: Vetro Artistico Murano: Collective mark, Regione Veneto law no. 70 of 23 Dec 1994.
• Hotel Designs, 27 Mar 2026 (lead times, part 3): Trade press benchmark for programme only.

Questions we are asked

How do I specify a Murano glass chandelier?

Fix the dimension set (drop, overall height, overall diameter) on a drawing, name the glass technique and colour sample for each element, require the workshop to declare the weight, have a structural engineer design the fixing, state the lamp and dimming requirement, and ask for the declaration of conformity and origin documents with delivery. The wording below covers each step.

How long does a Murano glass chandelier take?

Our pages give 14 to 18 weeks from written approval of the drawings and samples to delivery, depending on the furnace schedule. UK trade press has described about 22 weeks as normal for decorative lighting in general. The workshop confirms the programme for each piece.

How can I tell whether glass is genuinely Murano?

Ask the workshop whether it holds the Vetro Artistico Murano mark, a collective trademark under Veneto regional law no. 70 of 1994 managed by the Consorzio Promovetro Murano, and require origin documents with delivery. The mark is about where and how the glass was made, not about electrical certification.

How much does a Murano chandelier weigh?

It depends on the size, the number of arms and the thickness of the glass, so there is no useful typical figure. The workshop declares the weight on the shop drawing and a structural engineer designs the fixing for that figure.

Can Murano glass colour be matched exactly?

Not exactly: the glass is hand-made and coloured in the melt. Approve a physical sample under the project lighting, keep a signed control piece, and ask the workshop for its colour-matching limit in writing.

Is Murano glass the same as lead crystal?

Not necessarily. Crystal is a legal category based on composition: under Directive 69/493/EEC annex I, lead crystal needs at least 24% lead oxide and a density of at least 2.90. Hand-blown Murano glass is not automatically any of these categories, so ask the workshop to state the glass type and composition.