Choosing Lumien Lights for Core-Drilled Installations
Choosing Lumien lights for a core-drilled installation starts with the module that enters the opening. Compare its diameter and axial dimensions, then add the sleeve, connector and mounting requirements of the complete assembly. The visible trim determines the finished appearance, but it does not by itself tell you which core-drill bit to buy.
This guide compares brass Nano, Half Nano, Micro and Macro modules for recessed landscape lighting in concrete and masonry. If you are new to the system, read Lumien modules and Quick Connect explained first.
Nano, Micro and Macro module dimensions
| Brass module family | Module diameter shown | Axial dimensions shown in drawing | Specification |
|---|---|---|---|
| Nano (N4B1 / N7B1 / N8B1) | 1.09 in. | 1.94 in. and 3.32 in. | Nano drawing |
| Half Nano (N4B2) | 1.09 in. | 0.97 in. and 2.35 in. | Half Nano drawing |
| Micro (M4B1 / M7B1 / M8B1) | 1.59 in. | 1.26 in. and 2.64 in. | Micro drawing |
| Macro (Z4B1 / Z7B1 / Z9B1) | 2.72 in. | 3.05 in. and 4.43 in. | Macro drawing |
The two axial measurements are the separate length callouts on each manufacturer drawing. Open the linked drawing to see their endpoints and the connector arrangement. Neither number alone is a universal required hole depth: allow for the selected top, sleeve, lead routing, connection and service access. These brass dimensions should not be transferred to aluminum Micro, Nano Knuckle or another assembly without its drawing.
Nano versus Half Nano: the diameter is the same in these drawings. Half Nano provides a shorter body, which may help where depth is limited. A shorter module still needs compatible accessories and room behind it for its connection.
How to use module size when selecting a core-drill bit
- Identify what enters the hole. Is it the module with a rubber sleeve, a separate PVC mounting tube, or another housing?
- Read the module drawing. Use the diameter and axial dimensions to compare families and reject assemblies that cannot fit the available space.
- Check the outside dimension of the complete inserted assembly. Sleeve thickness and PVC outside diameter matter. A nominal pipe size is not its outside diameter.
- Use the installation’s specified opening and verify a sample. Confirm the required fit with the actual parts and a test opening in suitable spare material before drilling the finished surface.
For example, a 1.59-inch Micro module gives a useful starting dimension. It does not establish that a 1.59-inch hole—or the next available bit—will provide the intended retention and sleeve fit. The same distinction applies to Nano and Macro. The current module sheets linked here give dimensions but do not specify a universal core-bit size for every top and mounting method.
Choose the lighting effect before choosing the largest module
Concrete steps and stair risers: evaluate light on the walking surface and visibility of the source from above and below. A directional or shielded top may suit a different purpose than an open flush top. Mock up the intended configuration at night before committing to spacing.
Patio borders and masonry details: compare the scale of the trim with the surface pattern. Position holes around joints, edges, wiring access and the approved structural layout. Consider how the assembly can be removed after the hardscape is complete.
Recessed uplighting: compare the beam with the target’s distance and width. Module lumens and wattage alone do not predict the finished effect once a trim, diffuser or shield is fitted.
Traffic-bearing locations: verify the rating and installation requirements for the complete fixture arrangement. Do not extend one accessory’s drive-over designation to every combination or assume an IP rating establishes load capacity or pool suitability.
Parts needed: example Lumien recessed assemblies
| Example | Module: quantity 1 | Separate flush top: quantity 1 | Mounting component to review |
|---|---|---|---|
| Nano, fixed 2700K, 30° | N4B1-2.5W-27K-30-A | LAB-106 / BQCN-MKR-106-A | Included module sleeve; LAP-007 / PVCQCN-MNT-007 if the selected installation uses Nano PVC |
| Brass Micro, fixed 2700K, 40° | M4B1-3.5W-27K-40-A | LAB-024 / BQCM-MKR-024-A | LAP-008 / PVCQCM-MNT-008 for the matching PVC installation; confirm the required sleeve for a direct core fit |
| Macro, fixed 2700K, 40° | Z4B1-10W-27K-A | LAB-128 / BQCZ-MKR-128-A | Confirm the exact Macro sleeve/housing and opening for the project before ordering the mounting parts |
These are ordering examples drawn from matching module and accessory families. They are not preassembled kits. The flush top and light source are separate items. Use the full SKU and current manufacturer number when checking the order.
| Part or supply | Included or separate? | Quantity planning |
|---|---|---|
| Quick Connect lead and locking hardware | Current brass module pages list a 6-foot lead and lock screw; check the exact supplied package. | One connection per module; add longer compatible leads only when needed. |
| Sleeves and seals | Nano and Half Nano list a core-drill sleeve. Micro lists two Micro O-rings; do not mistake those O-rings for a separate mounting sleeve. | Confirm the complete seal and retention arrangement for each light. |
| Transformer | Separate unless expressly sold in a kit. | Size for the total connected VA/load and the manufacturer’s limits. |
| Landscape cable and waterproof connectors | Separate project supplies. | Plan by actual cable routes, conductor sizes and connection count. |
| Compatible PRO control | Required only for the selected PRO functions; verify inclusion. | Confirm the control arrangement for all selected modules. |
| Drainage and service provisions | Part of installation design, not supplied by purchasing a module. | Provide for each recess as required by the approved installation. |
What if a recessed opening is not practical?
A concealed cable route or sufficient depth may not be available in an existing wall. Compare Lumien hardscape lighting and step lighting for other mounting approaches. These alternatives have their own mounting requirements; they are not interchangeable with the recessed module assemblies above.
Complete the project plan
Record the fixture location, module SKU, top SKU, inserted assembly dimensions, confirmed opening, cable route and access method for every light. Then use our core-drilling installation guide to organize the site work. Shop Nano modules, Micro modules and Macro modules after the assembly has been selected.
Manufacturer drawings and specifications
Reference documents checked November 10, 2026. Download the brass Nano module specification, brass Half-Nano module specification, brass Micro module specification, brass Macro module specification. Drawings describe the listed families; match your exact product and revision before ordering or drilling.
Accessory references: Lumien Nano flush top, Lumien Micro flush top, Lumien Macro flush top, Nano PVC and Micro PVC.
- Jenny Branch