Attribute Schema Library
Attribute schemalighting

High Bay Fixture Attributes

High bay fixtures are LED luminaires for ceilings above roughly 20 ft — warehouses, manufacturing floors, distribution centers, gyms, hangars. Electrical distributors sell them two ways: to contractors bidding a written spec, and to MRO buyers swapping out 400 W metal halide one-for-one. Both filter on delivered lumens, not watts.

The data is hard because the spec lives in an ordering code, not a field. A page for RHU-5MC2-CDCN-NGN or IBH 12000LM SD080MD MVOLT 40K 70CRI encodes wattage, lumens, lens, distribution, voltage, mounting and controls in one string, with the performance table stranded in a PDF. Field-selectable SKUs compound it: one MPN with a wattage dip switch and a CCT switch is nine lumen/wattage states, and most catalogs store one.

Standards move underneath the catalog. The DLC began accepting SSL V6.0 applications on 5 January 2026; V5.1 listings not updated by 9 October 2026 are delisted on 15 December 2026, taking most utility rebates with them. A boolean "DLC Listed" field cannot tell you which SKUs are about to stop qualifying.

Core

Every SKU needs these. Without them the record is not a product, it is a row.

Manufacturer Part Number (MPN)
identifier
RHU-5MC2-CDCN-NGN

The ordering code is the product. Wattage, CCT, voltage, lens, mounting and controls are encoded in it; quoting the family number ships the wrong build.

GTIN / UPC
identifier
00745973012345 (GTIN-14)

Keys barcode receiving, the IDW record and every marketplace listing. A SKU without one is stranded in any channel that matches on it.

Form Factor
enum
Round (UFO)

First filter on the rail. Round (UFO) fits between ducts and pipes; linear covers aisles with fewer fixtures. Buyers pick shape before anything else.

Delivered Lumens
number · lm
21,100 lm

What buyers actually filter on. A 400 W metal halide replacement lands around 16,000-24,000 lm; watts alone say nothing about output.

Input Wattage (System)
number · W
163 W

Drives the rebate calculation, the panel schedule and the circuit count. Must be system wattage including driver losses, not LED board watts.

Correlated Color Temperature (CCT)
enum · K
5000 K

Warehouses standardize on 4000 K or 5000 K and will not mix. It also moves the lumen value — the 4000 K build is usually lower output than 5000 K.

Input Voltage Range
enum · V
120-277 VAC

Decides whether the fixture lands on the building's service. 120-277 V and 277-480 V are different builds; 347 V is a Canadian requirement.

Mounting Type
enum
Hook (chain/cable); pendant kit optional

Decides what hardware ships. Hook/chain, pendant, yoke and surface are different accessory kits; the wrong one stops the install at the lift.

Differentiating

What buyers actually compare on. This is where catalogs win or lose the filter.

Efficacy
number · lm/W
148 lm/W

The DLC threshold and the rebate turn on it, and it is a live filter facet. Report delivered lumens over system watts, not LED-package efficacy.

Color Rendering Index (CRI)
number
80

80 CRI is the industrial default; 90+ gets specified where paint matching or visual inspection happens. Higher CRI normally costs lumens.

Beam Distribution / Beam Angle
enum · degrees
120 degrees (wide); 60 / 90 optional

Sets fixture count and spacing. A 60 degree narrow beam at 35 ft and a 120 degree wide beam at 20 ft light the same floor with different layouts.

Dimming & Control Interface
enum
0-10 V, dims to 6%

0-10 V is the default, but the dim-to floor and whether the fixture is controls-ready or NLC-capable decide rebate tier and control-system fit.

Field-Selectable Wattage / CCT
boolean
Yes — 100/150/200 W, 4000/5000/6500 K

A dip-switch SKU is nine products under one MPN. Buyers need to know it is selectable before they can trust any single wattage or lumen figure.

Ambient Operating Temperature Range
range · °C
-40 °C to +55 °C

Unheated warehouses, freezers, foundries and battery-backup models all have limits. Drivers derate or shut down outside the rated window.

Compliance & identifiers

Standards, regulatory data, and the identifiers channels reject you for missing.

Safety Listing & Location Rating
enum
UL 1598, UL 8750, CSA C22.2 No. 250.0; damp

UL 1598 / UL 8750 with a dry, damp or wet rating is the baseline. Hazardous areas need UL 844; food plants need NSF. These are not interchangeable.

IP Rating
enum
IP65 (IP69K available)

Washdown, dust and outdoor-adjacent bays turn on it. IP65 is the common floor; IP69K exists for high-pressure washdown. Pair with IK for impact.

DLC Classification & QPL ID
identifier
DLC Premium (SSL V6.0)

Utility rebates pay against a QPL listing, not a marketing claim. Store classification, QPL product ID and the technical requirements version.

Country of Origin
identifier
Mexico

Drives duty, customs paperwork and the domestic-content questions that land on federally funded and public-sector RFQs.

The fields that aren't in the schema at all

What most high bay fixtures catalogs are missing.

The table above is the schema most catalogs already have. These are the attributes that usually aren't in it — each one surfaced by a signal from the live market rather than by an audit of what's already there. This is what Anglera's Schema Foundry does on a real catalog, in this category.

Supplier signal
+ Lumen maintenance basis (L-value @ hours @ ambient)

Supplier datasheets publish 'L90 >100,000 h @ 25°C' and 'L70 100,000 hours' side by side. Catalogs keep one 'rated life' text field, so the two claims land in the same column.

Two fixtures look identical on the rail; the L70 unit is measurably dimmer at the same hour count. Spec-grade bids lose, and rebate paperwork gets kicked back.

Competitor signal
+ DLC technical requirements version + QPL ID

Competitor rails filter on DLC Premium; none expose which TR version the listing sits under, or the QPL product ID needed to re-verify it. Catalogs carry a boolean instead.

V5.1 listings not updated by 9 Oct 2026 are delisted 15 Dec 2026. Without the version you learn which SKUs stopped qualifying when the customer does.

Search signal
+ Selectable output table (W/CCT/lm per position)

Buyers search '150W 4000K high bay' and get nothing from a 100/150/200 W, 4000/5000/6500 K dip-switch SKU that is literally a 150 W 4000 K fixture at one switch position.

The SKU is invisible on the rail at two of three wattages, and the published lumen figure is wrong for every position except the one that got typed in.

Review signal
+ Lens material / glass-free construction

One family ships tempered glass, diffused polycarbonate and acrylic lenses under near-identical part numbers. Catalogs call all three 'high bay lens'. Buyers ask 'is this glass?'

A glass-lens fixture shipped to a no-glass food plant is rejected at the door and returned, and the job stalls waiting on the polycarbonate build.

Supplier signal
+ Surge protection rating (kV / kA)

Makers publish 6 kV standard with 10 kV optional, or 10 kV/5 kA per ANSI/IEEE C62.41.2 — always as an option code in the ordering tree, rarely as a field on the catalog page.

Specs calling for 10 kV get quoted the 6 kV base SKU. It is caught at submittal, or after the first strike takes out a row of fixtures.

How Schema Foundry finds these

Messy in, governed out.

The same value, spelled every way lighting suppliers spell it. A filter only works once they agree.

Correlated Color Temperature (CCT)
5000K5000 K5,000KCool WhiteDaylight50K
5000 K

'Daylight' is 5000 K at one supplier and 6500 K at the next, and Dialight calls 5000 K 'cool white'. The word is not a value.

Input Voltage Range
120-277V120/277MVOLT100-277 VACUniversal347-480V
120-277 VAC

MVOLT is a Lithonia ordering code for 120-277 V. 'Universal' spans a different range per brand, and 347 V only matters in Canada.

Beam Distribution
120°120 DegreeWideMediumAisleType V
Wide (120°)

Dialight ships Narrow/Medium/Wide/Aisle; UFO suppliers ship degrees. The crosswalk needs the photometric file, not the marketing word.

Mounting Type
HookEye-HookChain/CablePendantYoke1/2" NPT pipe
Hook (chain/cable)

Hook, pendant and yoke are different accessory kits. The governed value has to say what actually ships in the carton.

What buyers ask

Every one of these should be answerable from the attributes above. If it isn't, that's a gap.

  • How many fixtures do I need for a 30 ft ceiling at 30 footcandles?
  • Is this the V6.0 DLC listing, or does the rebate die in December?
  • Does the 4000K version put out the same lumens as the 5000K?
  • Will it start and run in an unheated warehouse at -20°F?
  • Is the lens glass? We're a no-glass food plant.
  • Does the hook come with it, or is the pendant kit a separate line?
  • What wattage and lumens do I get at each dip-switch position?
  • Will it dim off our existing 0-10V panel without a new controller?

What channels require

The same SKU, different mandatory fields per destination.

Distributor's own filter rail
Form FactorDelivered LumensInput WattageCCTInput Voltage RangeMounting Type
IDEA Industry Data Warehouse (IDW)
Manufacturer Part NumberGTIN / UPCBrandUNSPSC codeCountry of OriginPackaging / selling UOM
DLC Qualified Products List (SSL V6.0)
Delivered LumensInput WattageEfficacy (lm/W)CCT and CRILumen maintenance + driver lifetimeWarranty (5 yr minimum)
Amazon Business
GTIN / UPCBrandManufacturer Part NumberDelivered LumensInput WattageInput Voltage Range

High Bay Fixtures data, in practice

What separates a high bay from a low bay?

Mounting height and distribution. High bays are specified for ceilings above roughly 20 ft and concentrate output into a narrower beam so it reaches the work plane; low bays sit below that and spread wider. The DLC treats them as separate primary use designations with separate light-output and efficacy thresholds — under V5.1, high bay listings start at ≥10,000 lm while low bay covers 5,000-10,000 lm. The practical consequence for a catalog: the same physical family can appear on both rails, and the fixture's DLC listing, not its product name, decides which one it belongs on.

Is a 'DLC Listed' flag enough, or do I need the version?

Carry the version and the QPL ID. The DLC began accepting SSL V6.0 applications on 5 January 2026. Listings still on V5.1 must be updated by 9 October 2026 or they are delisted on 15 December 2026, and most North American utility rebates key off QPL status. A boolean cannot tell you which SKUs are about to lose eligibility, and it cannot be re-verified against the QPL without an ID. V6.0 also adds primary use designations that did not exist under V5.1 — hazardous environment high bay, indirect high bay — so a product's classification can change without the fixture changing.

How should selectable-wattage / selectable-CCT SKUs be modeled?

As ranges, not values. The DLC itself lists these products with minimum and maximum wattage, minimum and maximum CCT, and minimum and maximum light output as separate fields. A single 'Wattage: 200 W' entry on a 100/150/200 W dip-switch fixture makes the SKU invisible to a buyer filtering for 100 W, and makes the lumen figure wrong for two of the three positions. Store the switch positions as a table, expose min/max on the filter rail, and keep delivered lumens tied to each position rather than to the SKU.

Lumens or watts — which should the rail lead with?

Buyers filter on delivered lumens; watts still have to be right. Wattage-first thinking is a holdover from HID, where 400 W meant something consistent. It doesn't for LED. The rebate, the panel schedule and the circuit count are all calculated on system wattage, so both fields must be present and both must be system-level: delivered lumens out of the fixture rather than LED package lumens, and input watts including driver losses. Efficacy is the ratio of the two and is itself a filter facet (Grainger exposes lm/W bands), so compute it from the governed numbers instead of copying a datasheet headline.

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