Large LED Downlights Recessed for Big Diamemter Hole with Modular Design

The ILED-DL-B T2 is a large recessed LED downlight built for ceiling holes that standard fixtures do not cover. It is aimed at commercial retrofits where the existing cutout is too big for a normal downlight and re-cutting the ceiling is not practical.

Range and models

Four models share the same design and differ in size. The ILED-DL6-B T2 is 195mm in diameter by 51mm deep, with a cutout of 165-180mm. The ILED-DL8-B T2 is 230mm by 51mm, cutout 200-220mm. The ILED-DL10-B T2 is 285mm by 60mm, cutout 245-270mm. The ILED-DL12-B T2 is 305mm by 69mm, cutout 270-290mm. All four run 15W to 35W and put out 2,000 to 4,000 lm at 120 lm/W. The profile is low — 51 to 69mm deep — so the fixture sits close to the ceiling line and does not intrude into the room.

Modular heatsink

All four models use the same heatsink module. For an installer stocking spare parts, one module covers the whole range, so a repair in the field is a module swap rather than a full fixture replacement. Thermal behavior is consistent across sizes because the module is the same, and the aluminum body handles heat passively — no fans, no moving parts, no maintenance.

Light source

The fixture uses LM80-certified LEDs, a rating that tracks lumen maintenance over time. Color rendering is available in two grades: CRI above 82 as the standard option, or CRI 90 when accurate color matters — retail displays, galleries, and finish-sensitive spaces are the usual cases. Color temperature is selectable between 3000K, 4000K, and 6000K via a switch, so the fixture can be set after installation to match the room. This matters in spaces where the use changes — a lobby that hosts daytime work and evening events can shift between 4000K and 3000K without changing fixtures.

Power and electrical

Input voltage accepts 220-240VAC or 110-277VAC. The fixture is electrical Class II, so it does not require an earth connection. Power factor is above 0.9. The driver is built in, so there is no separate driver box to mount above the ceiling — one less component to fit in the cavity.

Beam and coverage

The beam angle is 120°, which spreads light widely across open floors and lobbies. For ceilings above 3 meters, the wide beam means fewer fixtures are needed to cover a given area. The optics control spill, so the light stays on the floor rather than washing the walls. In a large atrium, this is the difference between uniform floor illumination and patchy pools of light.

Construction and IP rating

The body is aluminum with PC optics, in white or black finish. The standard rating is IP42, which covers normal indoor use. IP54 is available as an option for dusty or damp areas such as corridors, workshops, and semi-exposed spaces. Choose the rating at order time; it is not field-convertible, so decide based on the actual environment before ordering.

Control options

Four functions are offered, selected at order: DALI for networked control in smart buildings, Triac dimming for standard wall dimmers, 0-10V for analog control systems, and an emergency version that keeps the fixture lit from a backup supply during a power outage. The emergency version needs separate wiring to the backup source, so factor that into the install.

Warranty and certifications

Warranty is 3 to 5 years depending on configuration. The fixture carries SAA, CE, and RoHS certifications.

Typical use cases

Large atriums and lobbies use the wide beam to fill high spaces with fewer fixtures. Retail and exhibition spaces use the CRI 90 option for merchandise. Offices retrofit the large-diameter housings into existing ceiling grids. Hotels use the low-profile body in ballrooms and corridors. Industrial and warehouse areas take the IP54 version for dusty environments.

Buyers choose the ILED-DL-B T2 for a few specific reasons:

Big-hole coverage. Cutouts from 165mm up to 290mm across four models. When a ceiling is already cut for a large downlight, this fixture drops in without re-cutting or patching the hole.

One heatsink for the whole range. Four models share the same module. Installers stock one spare part, and field repairs are module swaps rather than full fixture replacements.

Switchable color temperature. 3000K, 4000K, and 6000K are selected on-site with a switch. If the room use changes, the CCT changes with it — no need to order a different fixture.

Choice of CRI. CRI above 82 for general use, or CRI 90 where color accuracy matters. Pick the grade that matches the space, and the LM80-certified LEDs hold their output over time.

Control options at order. DALI, Triac, 0-10V, or emergency. The fixture is built to match the control system in the building, whether that is a networked DALI bus or a standard wall dimmer.

The ILED-DL-B T2 fits several commercial settings where large ceiling holes are already cut:

Atriums and lobbies. The 120° beam fills high, open spaces with fewer fixtures. DALI control ties the lights into building scenes for events and off-hours, and the 3CCT switch shifts the tone between daytime and evening.

Retail and exhibition spaces. The CRI 90 option keeps merchandise colors accurate, and the 3CCT switch adapts the light as displays change. The IP54 version handles temporary setups with minor splash risk.

Offices and conference rooms. The large housing retrofits old ceiling grids without structural work. Triac dimming suits meeting rooms that use standard wall dimmers, and the low profile keeps the fixture out of the sight line.

Hotels and hospitality. The low-profile aluminum body in white or black blends into ballroom and corridor ceilings. One heatsink module across sizes simplifies maintenance in multi-building properties.

Industrial and warehouse areas. The IP54 version tolerates dust, and the 0-10V control zones lighting over workstations. The 4,000 lm output covers aisles and loading areas with fewer fixtures than smaller downlights.

Museums and galleries. The CRI 90 option keeps artwork colors accurate, and the wide beam covers large display halls without visible fixture spacing.

A few things to check before ordering:

Measure the existing hole. The four models cover cutouts of 165-180mm, 200-220mm, 245-270mm, and 270-290mm. Measure the hole and the ceiling cavity depth before choosing — the bodies are 51 to 69mm deep.

IP rating. IP42 is standard for dry indoor use. IP54 is the option for dusty or damp areas. The rating is fixed at order and cannot be changed later.

Control function. DALI, Triac, 0-10V, and emergency are selected when the fixture is built. Match the option to the control system already in the building — they are not interchangeable after delivery.

Color temperature. The 3CCT switch sets 3000K, 4000K, or 6000K on-site. If the room has other fixtures, set them all to the same CCT before locking in the switch.

CRI grade. CRI above 82 covers general use. Choose CRI 90 for retail displays, galleries, and spaces where color judgment matters.

Emergency wiring. The emergency version needs a separate connection to a backup supply. If you are retrofitting into an existing ceiling, confirm the wiring path before installation.