Lotus Tangra L1F-RDI 1" Fixed Round Invisible-Trim LED Downlight | 5CCT

Quick choice: The Lotus Tangra L1F-RDI is a Canadian-made 1-inch fixed round, deep-regressed invisible-trim LED downlight for discreet, trimless architectural accent and general lighting. Its recessed light source supports a minimal-glare appearance when the ceiling is finished for an invisible trim. Choose L1F-RDI for a trimless 1-inch nominal aperture; choose L1F-RDT instead if the design calls for a visible thin trim. L1F-RDI is fixed, not a tilt-adjustable gimbal.

At a glance: 5W • up to 490 lumens at 4000K/CRI95 (manufacturer test condition) • 24V DC constant-voltage fixture • five selectable white CCTs (2700, 3000, 3500, 4000, 5000K) • CRI95 or CRI98 by SKU • 25° clear, 40° clear or 40° frosted optics • white or black finishes • 1½-inch ROUND ceiling cutout • 3 inches space above ceiling • manufacturer lists Type IC, air tight and wet location • separate Lotus KVE 5-in-1 dimmable driver required.

Select the correct fixture from 12 manufacturer SKUs

Choose finish, optic/beam and CRI in the product selectors. The 12 offered configurations are actual separately barcoded manufacturer SKUs. The displayed finish image represents the exterior choice, not a photometric simulation; the selected SKU determines beam spread and CRI.

• Finish: WH = White; BK = Black. Unlike the visible-trim Tangra families, the L1F-RDI invisible-trim price list offers only these two finishes.
• Optic and beam: RC25 = clear-glass reflector, 25°; RC40 = clear-glass reflector, 40°; RF40 = frosted-glass reflector, 40°. A frosted 25° optic is not part of the supplied SKU range.
• LED grade: 5C95 = CRI95; 5C98 = CRI98. Both are field-selectable 5CCT LED engines. CRI is a fixed characteristic of the ordered hardware, not something changed by the CCT switch.

How to choose: Match the white or black finish to the ceiling design, then choose the specified clear 25°, clear 40° or frosted 40° reflector and CRI95/98. The 25° or 40° value describes the nominal optical beam, not mechanical aiming: this model does not tilt or rotate. Lotus states up to 490 lumens at 4000K/CRI95 only. Exact output for CRI98, other Kelvin settings or specific optics requires the corresponding SKU's photometric data.

Manufacturer-verified L1F-RDI specifications

Construction planning: The invisible-trim style is intended for a trimless ceiling finish, not simply a visible-trim fixture with a different colour. Check the current model-specific Lotus installation instructions for finishing and mounting procedures. The one-page specification does not establish plastering steps, an IP number or any fire-resistance-hour classification.

Required KVE dimmable driver — sold separately

Do not connect this fixture directly to mains voltage. L1F-RDI is a 5W, 24V DC constant-voltage luminaire. The separately purchased Lotus KVE 5-in-1 dimmable drivers accept 120–277V line input and supply the fixture. The driver is not included in this fixture's price. Lotus publishes the following L1F-RDI-specific fixture counts:

Browse compatible 24V Lotus Mini Tangra KVE drivers. These are manufacturer-stated maximum fixture counts, subject to suitable circuit layout, driver/control matching, conductor selection, wiring lengths and voltage drop. A 5W model's permitted counts must not be applied to the 8W Mini Tangra families.

Trimless ceiling cutout and matching PR-112 plate

The L1F-RDI requires a 1½-inch ROUND ceiling cutout and 3 inches of free space above the ceiling. Lotus lists the PR-112 26-inch flat rough-in plate for this trimless model. PR-112 is sold separately and is not included in the light price. Choose PR-112 from the Mini Tangra rough-in plate collection. Check accessory order quantities and installation suitability before cutting.

Ratings clarification: Wet-location, Type IC and air-tight are manufacturer-listed. This sheet does not supply a numerical IP rating, an underwater/submersible rating or a fire-resistance-hour approval. Confirm suitability for the actual ceiling/environment against current Lotus instructions and applicable electrical/building codes.

Compare the Mini Tangra models

• L1F-RDT: 1-inch fixed round visible thin trim with 1⅜-inch ROUND cutout and PR-138 plate; published maximum is 470 lm at 4000K/CRI95.
• L1F-SDT: 1-inch fixed square thin trim with a 1⅜-inch SQUARE cutout and PS-138 plate; published maximum is 500 lm at 4000K/CRI95.
• L2F-RDI: 2-inch fixed round invisible trim, 8W and a larger 2³⁄₁₆-inch round cutout; uses PR-236 plate and has different driver maximums.
• L2G-RRT: 2-inch aimable round gimbal when a 20° tilt and 360° rotation are required rather than a fixed axis.

Frequently asked buyer questions

Is L1F-RDI the same installation as L1F-RDT?

No. The L1F-RDI is invisible-trim and requires a 1½-inch round opening with PR-112 rough-in plate. The visible thin-trim L1F-RDT uses a 1⅜-inch round cutout and PR-138. Confirm the ceiling finishing method before substitution.

Can I use a 30W KVE driver to power six fixtures?

Lotus states a maximum of six 5W L1F-RDI fixtures on KVE-24030-TMWJ1-VA, subject to voltage-drop, wiring and control compatibility. The 60W and 96W models allow up to 12 and 19 respectively under the published limits.

Do I need a separate driver or rough-in plate?

Driver: yes, separately purchased and required. The PR-112 construction plate is also sold separately and may be specified for the ceiling installation. Neither accessory is included in the fixture price.

Does every SKU output 490 lumens?

Not necessarily. The manufacturer states up to 490 lumens at 4000K/CRI95. Exact outputs for CRI98, other CCTs and other optics are not provided on this sheet.

Does this product ship immediately?

The October 2026 supplier announcement projected November 2026 for Mini Tangra availability. This is not verified Simply Controlled inventory, confirmed supplier stock or a delivery guarantee. Confirm current stock before scheduling work.

Manufacturer documentation: Lotus L1F-RDI specification sheet and manufacturer warranty terms.