Built around a metal body
The RD10 is a LED light engine: a self-contained round light module designed to be installed inside a housing, a puck cup, a track head or a custom-built fixture rather than sold as a finished luminaire. Its defining feature is the metal housing. Plastic-bodied modules trap heat against the LED chip; a metal casing conducts that heat away and spreads it out, which keeps the junction temperature lower. Cooler running means more stable lumen output over time and a longer operational life — a real advantage when the module is buried inside millwork, a display case or a sealed fixture where getting back in for service is expensive and disruptive.
Light quality you will notice
The 2700K warm white output is the classic cozy tone people associate with incandescent light. It flatters walnut, oak and maple cabinetry, warms up stone and quartz counters, makes brass and copper hardware come alive, and keeps hospitality spaces feeling relaxed rather than institutional. LumenstarLED engineered the RD10 for applications where precision, reliability and consistent colour rendering matter — meaning a run of modules in the same kitchen or the same retail display reads as one continuous, even light rather than a patchwork of mismatched tones.
Technical specifications
SKU: LS-RD10-4W-27K
Brand: LumenstarLED
Type: RD10 LED light engine / LED module
Power: 4W
Input voltage: 12V DC
Colour temperature: 2700K warm white
Housing: metal
Category: puck and under-cabinet lighting
Wiring and installation
This is a low-voltage 12V DC component, so it must be fed by an LED driver or low-voltage transformer suited to 12V DC output — never connect it straight to line voltage. Add up the wattage of every module on the circuit and choose a power supply with enough headroom; if you want the lights to dim, the driver has to be the dimmable type and paired with a compatible wall control, since dimming on a 12V LED module is handled at the driver, not at the module. Keep low-voltage runs reasonably short and use adequate conductor gauge to avoid voltage drop at the far end of a long cabinet run, and always leave a little air around the metal body so it can do its job of shedding heat.
Where it earns its keep
Typical jobs include under-cabinet and in-cabinet lighting in kitchens and bathrooms, lighting for glass display cases and jewellery counters, closet and pantry millwork, cove and toe-kick details, bar backs, and replacement or upgrade modules inside track light heads. OEM integrators and custom fixture shops use the RD10 as a standard building block because the compact form factor repeats cleanly from one fixture to the next. In Canadian homes and businesses, swapping 12V halogen pucks for this 4W engine cuts energy use dramatically while keeping that familiar warm glow. No spec sheet, IES file or installation video is currently posted for this module, so if your project needs photometric data or a dimensional drawing, ask before you specify it into a large order.