What this accessory is
The LS-RT05-WIN-BK is the window trim (face trim / bezel) for the LUMENSTARLED RT05 screwless step light platform, sold as the finishing face for the RT05HV and RT05LV light engines. In a screwless design, the trim is what you see — there are no visible fasteners breaking up the face, just a clean rectangle of black against the wall. It conceals the cut edge of the opening, hides the housing and holds proper alignment with the light engine aperture so the beam exits the way the optic intended, without shadowing or light leak around the frame.
Fit and installation
Nothing about this trim requires improvisation. It is dimensioned to the RT05 housing, which uses a hole cutout size of 4-3/4" × 2-7/8" (121 × 73 mm) and a fixture footprint of L120 x W74 x H38mm (L4 11/16 x W2 7/8 x H1 1/2"). Rough in the opening to the cutout dimension, land the light engine, then seat the trim for a flush, rattle-free face. Because the RT05 engines ship with a 12" (30 cm) wire lead, plan your junction box or driver location within reach before you close up the wall. Order one trim per light engine, and keep the finish consistent across a run — mixed finishes on a stair flight are the kind of detail clients notice immediately.
The RT05 system it completes
The RT05 light engines this trim serves are compact recessed fixtures rated IP67 and built for an operating range of -20°C to +45°C, which matters in Canadian stairwells, garages and covered exterior soffits. They run at 100V AC or 12V AC/DC depending on the HV or LV version, draw 2W / 2.2W, and deliver 145 lumens with a CRI greater than 90 — enough punch to mark a step or wash a baseboard without glare, and with the colour rendering to keep stone, wood and paint looking true. Colour temperature options across the family include 3000K warm white, 4000K natural white, RGB and RGBW, the engines are dimmable, they are c ETL us Listed, and they carry a 3-year warranty.
Technical specifications
SKU: LS-RT05-WIN-BK
Brand: LUMENSTARLED
Type: Window trim for RT05HV and RT05LV light engines
Trim colour: Black (family offered in black, brushed nickel, white)
Product code (system): LS-RT05
Hole cutout size: 4-3/4" × 2-7/8" (121 × 73 mm)
Fixture dimensions: L120 x W74 x H38mm (L4 11/16 x W2 7/8 x H1 1/2")
IP rating (light engine): IP67
Certifications (light engine): c ETL us Listed
Where it gets specified and what's in the Documentation tab
Black RT05 trims show up on hotel corridors and guest-room entries, restaurant stair runs, retail thresholds, condo and office lobbies, home theatre aisles, finished basements, and exterior soffits or porch steps where the IP67 engine belongs. Against a dark tile, charcoal paint, black-stained wood or a minimalist industrial wall, the black face nearly disappears by day and reads as a controlled line of light at night; on a pale wall it becomes a deliberate graphic accent. The RT05 SCREWLESS STEP LIGHT technical PDF is available in the Documentation tab — download it to confirm the cutout, the voltage version you need and the trim colour before you order, and add this black window trim to your cart in the same quantity as your light engines.