How to Read a Lighting Fixture Schedule

Short answer

A lighting fixture schedule lists every fixture type (by type mark, such as L1 or D2) with its description, manufacturer and catalogue number, lamp/LED data (lumens, CCT, CRI), voltage, wattage, dimming, mounting and remarks. The type mark ties each row to symbols on the lighting plans, which give quantities and locations, and to the specification, which sets substitution rules and requirements. Read all three together. Before quoting, check for missing lengths, voltages, dimming protocols, finishes and accessories.

Key takeaways

Type marks link the schedule to the plans (where and how many) and the spec (rules).

Quantities come from the plans; linear lengths often have to be measured.

Catalogue numbers are often incomplete: options left as ‘XX’ must be resolved.

Check voltage, dimming, CCT, finish and mounting on every line.

Read the notes and addenda; they change the schedule.

The three documents you need

Document	What it gives you
Fixture schedule	What each type is: description, product, performance, electrical
Lighting plans / reflected ceiling plans	Where each type goes, how many, run lengths
Specification (lighting section)	Requirements, substitution rules, submittal and closeout requirements

Plus addenda and notes. Reading the schedule alone is how most pricing errors start.

Column by column

A typical schedule row, and what to check in each column:

Column	Example	What to check
Type	L1	Matches symbols on the plans
Description	Recessed linear, 2" aperture, regressed lens	Mounting and ceiling type match the RCP
Manufacturer / catalogue no.	Brand X, LIN2-R-40K-XX-0-10V	Every option resolved; “XX” means a decision is still open
Lumens / W	400 lm/ft, 3.5 W/ft	Per foot or per fixture? Delivered or source?
CCT / CRI	4000K / 90	Consistent with other types in the same space
Voltage	120–277V	Matches the panel; 347V is common in Canada
Dimming	0-10V	Matches the control system
Mounting	Drywall, trimless	Plaster-in kit included?
Finish	White	Lens and trim finish too
Emergency	EM battery on 1 in 4	How many, which ones on the plans
Remarks	Continuous rows, corners per plans	Lengths must come from the plans

Eight details most often missing

Linear lengths and run layout: corners, feed points and joints.
Input voltage, especially 347V. See 347V lighting in Canada.
Dimming protocol and range.
Open catalogue options (“XX”, “specify”, “TBD”).
Finish of housing, trim and lens.
Accessories: suspension kits, canopies, plaster-in kits, end caps.
Emergency options and quantities.
Controls: sensors, power packs, interfaces.

Each one becomes a question after the quote, a resubmittal, or a wrong product on site. Raise them as RFIs early, or state your assumption clearly in the quote.

Linear types need extra care

For linear lighting the schedule usually describes the system, and the plans show the runs. You need each run’s length, how it breaks into sections, where corners are, where power feeds in and where the drivers go. Our guides on specifying custom linear lighting and what a custom linear quote needs list the details.

How SuppLux reads a schedule

SuppLux uses AI to read the schedule and spec, matches every type mark to verified products and alternates, and lists the missing details as questions before quoting, so you see open items in one place. See AI spec matching or send your schedule.

Frequently asked questions

What is a type mark on a lighting schedule?

A short code (for example L1, D2, X1) that identifies a fixture type. The same code appears next to fixture symbols on the plans, so you can count and locate each type.

Where do I find fixture quantities?

On the lighting plans, by counting the type marks. Schedules rarely give quantities, and when they do, the plans govern. Linear runs need to be measured from the plans or reflected ceiling plans.

What does 'or approved equal' mean on a schedule?

That alternates may be proposed, subject to the design team’s approval under the specification’s substitution procedure. See our guide on or-equal substitutions.

What if the schedule and the specification disagree?

Raise a request for information (RFI) before pricing. Do not pick one silently; the contract documents usually define an order of precedence, but the design team should confirm.

How to read a lighting fixture schedule (and what is usually missing)