How to Prepare an RFQ for Custom Lighting Glass Components

Direct answer

An RFQ for custom glass components should identify the lighting application, the drawing or sample, the required surface finish, any special tolerances and other project-specific requirements. Include a representative mating sample when a holder, gasket or frame controls fit. State your planned first-order quantity and any limit on the lot size you can accept. Ask the supplier to confirm its production minimum order quantity (MOQ) and the basis of the quote.

Choose your RFQ starting point

A request for quotation gives a supplier a defined basis for reviewing a part and pricing the work. For commercial lighting, start with what the glass does in the fixture. It may transmit light through an opening, diffuse the source, protect an optical assembly or form part of the visible design. Name the application, such as a retail spotlight, a hospitality pendant or an exterior wall luminaire. State how and where the fixture is installed. Add the conditions that affect the part, such as the position of the light source, exposure to moisture or a seal at the mounting interface.

If you have a drawing

Attach the current drawing with the part number, revision and units. Include the relevant assembly section when a holder, frame or seal locates the glass. Indicate which document controls the dimensions if you also send a CAD model. Identify the features that affect fit or appearance and any requirements that still need review. Where the geometry and quantity are defined, ask for a quotation against that revision. An OEM or ODM project review can help establish the right starting point when some requirements are still in development.

If you have a physical sample

Identify the sample by part number or a temporary reference. Include a photograph of the part in the fixture, a view of the mounting area and a few reference dimensions with units. Say which features to match and which may change. For a replacement part, explain whether the sample came from a working fixture and whether the holder remains the same. A sample supports the discussion of form, finish and fit. Confirm the dimensions and acceptance criteria that will become the basis for approval.

If you have a concept

Describe the application, overall envelope, light source arrangement and intended appearance. Add a sketch or reference image with enough context to explain the mounting idea. State any fixed constraints, such as an existing metal housing or a required material, and mark the points open to design review. Request a feasibility review or a budget estimate with its assumptions. Once the part and interface are defined, issue the updated files for a quotation on that basis.

Send the mating hardware when it affects fit

The dimension that matters at assembly may be the distance from a glass shoulder to a retaining ring, the engagement of a thread or the position of a seat relative to a gasket. An outside diameter alone gives limited information about these interfaces. Show the contact surfaces and the direction in which the glass is installed. Include the actual hardware when the fit depends on how those parts meet.

For parts with critical mounting geometry, Easter Glass normally asks the customer for representative mating samples. This can be a threaded holder, a retaining ring, a bezel, a metal frame or the gasket that sits between the glass and the housing. Send the pieces needed to reproduce the interface. An assembly section can show how to use them and help identify which surfaces are intended to support, locate or retain the glass.

Threaded shades and their holders

A frosted borosilicate capsule shade with a threaded opening illustrates why the mounting detail needs its own reference. When requesting a quote from a supplier of threaded borosilicate glass shades for commercial luminaires, include the mating holder and any ring or spacer that affects how far the shade seats. Mark the visible position you want once the shade is installed. If the holder is still being designed, provide the current interface drawing and indicate when a representative part will be available. The borosilicate glass collection gives examples of other shapes and finishes to discuss during the review.

Stepped glass and a retaining frame

A stepped ultra-clear glass disc with a central opening illustrates a different interface. When sending an RFQ to a manufacturer of stepped glass discs for retained luminaire assemblies, identify the surface that locates the disc and the parts that keep it in place. Explain the role of the opening if it interacts with the fixture. Send the relevant frame or retainer if the available drawing leaves the fit unclear. Include any intended light-control function as a separate input. The optical glass collection shows why shape, mounting and optical requirements are worth documenting separately.

Covers that seat against a gasket

A clear oval borosilicate cover with a raised rim provides a useful geometry example. When working with a fabricator reviewing oval glass cover prototypes for gasketed fixtures, show where the gasket contacts the glass and where the holder locates it. Share the matching gasket and the relevant housing or retaining piece when those parts control the fit. State which checks apply to the glass and which apply to the assembled fixture. For more detail on rim and contact-band drawings, see the guide to borosilicate lighting glass design limits.

Label each sample before shipping

Give each sample an ID and use it in the RFQ, the attachment list and the parcel. Identify the revision of the hardware and whether it is a production part, a prototype or a reference only. A photo of the assembled interface helps the review team place loose parts in the right order. If the project has several sizes, list the corresponding glass and hardware pairs. Agree the shipping address, sample handling and any return arrangements before sending the parts. Record items that will arrive later and keep them visible as open inputs.

Build one RFQ checklist

Put the known information in one request and state who will resolve each open item. A simple way to start is to use three columns for what you can send now, what you will add later and what you want the supplier to confirm. The NIST MEP supplier-scouting guide offers a useful example of separating technical information, business requirements and supporting files. The following checklist adapts that approach to commercial lighting glass.

Use the application line to explain where the part works and what it is expected to do. A note such as “clear cover in a recessed fixture with a removable retaining frame” identifies both the function and the interface. Include the expected temperature or cleaning conditions if they affect material, finish or inspection. List project-specific requirements separately, such as an appearance limit in the lit fixture, a required inspection report or individual packing to protect a finished face. Mark each requirement as mandatory, preferred or open for review. This helps the supplier identify which conditions the quote must include.

Use the drawing and sample lines to establish which evidence controls which feature. A signed drawing may govern the mounting dimensions while an approved swatch governs the finish. If a physical reference and a drawing differ, explain which to follow or ask for the conflict to be resolved. The public description of ASME Y14.5 on dimensioning and tolerancing explains how drawings and models communicate design intent. Apply the drawing convention and revision agreed for your project.

Give the supplier a sample quantity, the first production quantity you want priced and any cap on the initial lot size. Ask for the applicable production MOQ by part and finish, along with the price at the quantities you can buy. Include a repeat-order forecast if it will affect the offer, and label it as an estimate. State the destination and required arrival date. Add packing and identification requirements if you already know them.

If you are asking for two versions, give each one an item code and its own quantity. A clear cover and a frosted cover can share one drawing revision while carrying different finish references. Showing both lines lets the supplier identify which work is common and where an option changes the offer.

Define the surface finish and special tolerances

Name the surface treatment and mark where it applies on the drawing. For a frosted cover, show which face is frosted, where the treated area ends and which mounting or sealing faces need to stay untreated. For a printed or coated part, show the pattern or coated area and its orientation in the fixture. Use an approved sample or a named finish reference if the appearance needs to match an existing fixture. If the finish is open for review, describe how the part should look in use and ask what reference can be used to approve it.

Give any special tolerance with its units and the feature it applies to. For example, a locating shoulder may need a tighter limit than the rest of the cover profile. Identify the mating part, the measurement location and the reference surface where relevant. Include the inspection method if the project has specified one. Ask the supplier to confirm feasibility and the checking method before using that tolerance as the basis of the quotation.

Set the acceptance basis

List the checks you need at the glass component stage and who will approve the first sample. A fit trial can use your mating hardware, while appearance may need a finish reference and agreed viewing conditions. Add inspection records or tests where required by the project. A lighting glass quality review gives the team a place to discuss the checks and records needed. The scope of IEC 60598-1 on general luminaire requirements and tests relates to luminaires. Put any complete-fixture evaluation in its own line in the RFQ.

Ask for the quotation you need

The response you need depends on the decisions still open. An early request can ask whether the part and assembly concept merit further development. A budget request can ask for an estimate on stated dimensions, finish and quantities. A quotation for an agreed design can identify the controlling revision, included operations and quote quantities. Tell the supplier which response will support your next decision and ask for any assumptions to be shown in the reply.

Ask for tooling and sample charges to be shown separately from the recurring glass part price where they apply. If the offer includes packing, inspection records or delivery, state the basis you want the supplier to use. Request the currency, the quantity breaks relevant to your purchase, and the milestones from which sampling and production timing are measured. These fields help you see what is covered before you use the quotation for a purchasing decision.

An open fit item can change the basis of the price. Suppose a buyer has an outline drawing for a cover and expects the metal frame to arrive later. The early estimate might assume an edge that seats without additional work. Once the frame and gasket are available, the supplier can review the interface and confirm whether that assumption still holds. Record the open item in the RFQ and ask which part of the offer should be revisited after the fit review.

Keep revisions tied to the offer

Give the RFQ a reference and list the files and sample IDs it contains. Use the same reference in replies about open items. When a change affects the mounting, finish or quantity, identify the change and ask which quotation lines it affects. Keep the quote, the fixture drawing and the sample tag connected to the same revision. If a holder or gasket will follow, record its ID, revision and expected availability on the attachment list.

How Easter Glass handles a factory-based RFQ in China

Easter Glass supplies custom glass components for commercial lighting. It operates a lighting glass factory in Yangzhou, Jiangsu, China. Its Shanghai headquarters handles international communication and project coordination. The company combines in-house manufacturing with specialized production partners according to the component and process requirements. The Easter Glass company profile describes the manufacturing base and operating model.

In a trading-company arrangement, the commercial contact may send a buyer’s inquiry to a separate manufacturer for technical and production review. In the Easter Glass model, the buyer can submit the drawing, glass sample and mating hardware together for a coordinated manufacturing review. The practical difference is where the questions about fit, process and sample verification are resolved. Ask which production route is proposed for your part and which questions need to be settled before a firm quotation.

For example, a buyer requesting a custom shade may supply the glass sample and its threaded holder. The review can relate the mounting position, the required visible finish and the planned check to the same part reference. If the buyer later changes the holder, that change becomes a recorded RFQ input. The resulting quotation can state the revised basis and identify any checks that depend on the new hardware.

Factory involvement is useful when it gives the buyer a specific manufacturing question to close. For a gasketed cover, that might be which rim surface locates the glass and which sample will be used for the fit check. For a proposed optical part, it might be which drawing features define the form and which checks must be performed in the fixture. The RFQ should capture the answer, the basis of the quotation and who will supply the reference parts.

Use the company introduction to understand the working environment behind the review. For your own request, identify the part, its fixture and the evidence you can share. Agree the proposed route, sample stage and inspection scope for that component so the manufacturing review and commercial reply address the same requirements.

Frequently asked questions

Can I request a quote with photos alone?

Photos can start a feasibility conversation when they show the part, its installation and a useful size reference. Add the intended use, key dimensions and quantities you know. For a quote tied to repeat production, ask what drawing, physical sample or agreed specification will be needed. Mark any price based on a photo as provisional until the relevant requirements are confirmed.

Which metal parts should I send with the glass?

Send the parts that locate, support or retain it when those features affect fit. Examples include a threaded holder, a retaining ring or the relevant piece of a housing. Include the corresponding gasket or spacer when it changes where the glass seats. A labeled photo or assembly section helps identify which parts go together.

Can the supplier start before the hardware arrives?

Share the available drawing and the known interface dimensions. Ask which questions can be reviewed from those inputs and which need a physical fit check. Label the hardware as pending and request any estimate with its assumptions shown. When the representative hardware arrives, confirm which parts of the quotation or sample plan need review.

Can the material or finish remain open?

State the required result and operating conditions, and identify the choice you want the supplier to review. Include a finish reference when appearance is critical. Ask the supplier to name the assumed material and finish in the response. Record the decision against the final drawing or approved sample so the specification follows the part into production.

Can one hardware sample represent several sizes?

Identify which sizes use the same mating part and which use a different frame, holder or gasket. State which combinations the sample represents and provide drawings for the others. If the locating or retention geometry changes with size, ask which combinations need a separate fit sample before approval.

What if my first order is below the production MOQ?

State the quantity you can actually order and ask whether it can be quoted as a pilot lot. If the supplier quotes a higher minimum, ask which part, finish and packaging specification it applies to. Keep any pilot price and the recurring production price on separate lines.

RFQ takeaway

A usable RFQ identifies the glass part, what it mates with, what needs to be verified and which quantities are being quoted. Start with the drawing, sample or concept you have, and keep the open items visible. When a holder, gasket or retainer controls fit, connect the physical sample to the same drawing revision and request. The reply can then identify its manufacturing and pricing basis.

Share your custom lighting glass RFQ

Send your drawing, reference sample or concept together with the fixture application, required finish, special tolerances, other project requirements and first-order quantity. Identify any mating hardware needed for fit review and ask how to arrange shipment. Easter Glass can review the inputs and discuss the quotation basis for your commercial lighting component.