Custom LED Bar Lighting Selection Guide
When selecting custom LED bar lighting, compare operating voltage (12 V / 24 V DC or 220 V AC), bar length (30–200 cm), SMD LED density, CCT and power supply sizing.
This guide explains what to look for when choosing products in the Custom LED Bar Lighting category for under-cabinet task lighting, retail display shelving, stretch ceilings and architectural coves.
Operating voltage (12 V DC / 24 V DC vs 220 V AC) and driver sizing
Rigid aluminum-core PCB LED bars dissipate heat far more effectively than flexible adhesive LED strips, preventing lumen depreciation. 12 V DC and 24 V DC LED bars require an external constant-voltage LED power supply (SMPS); 24 V DC bars minimize voltage drop on longer daisy-chained runs. Self-contained 220 V AC profile bars include an integrated driver for direct mains connection.
Bar length, SMD LED density and color temperature (CCT)
Standard lengths span 30 cm, 40 cm, 50 cm, 60 cm, 90 cm, 100 cm, 120 cm, 150 cm and 200 cm to match cabinet and gondola widths. Choose 3000K (Warm White) for bakery, wood and hospitality displays, 4000K (Neutral White) for kitchen counters and retail shelves, and 6500K (Daylight) for jewelry, workbenches and signage.
Custom LED bar lighting comparison table
| Selection Criterion | 12 V / 24 V DC Rigid Aluminum PCB Bar | Extruded Profile + Diffuser LED Bar | Optic-Lens (Backlight / Stretch Ceiling) Bar |
|---|---|---|---|
| Supply Voltage | 12 V DC or 24 V DC (requires external SMPS) | 12 V / 24 V DC or direct 220 V AC mains | 12 V / 24 V DC or constant-current driver |
| Construction | Bare rigid aluminum-core PCB strip | Anodized U-channel or corner profile + polycarbonate cover | Individual wide-angle PMMA optical lenses over each LED |
| Standard Lengths | 50 cm, 100 cm (cuttable at marked intervals) | 30 cm – 200 cm ready-to-mount fixtures | 50 cm, 100 cm modular matrix bars |
| Typical Application | Custom aluminum channels, showcases, enclosure lighting | Kitchen under-cabinet, retail shelves, wardrobes | Stretch ceilings (Barrisol), lightboxes & wall grazing |
Frequently asked questions
How do I size the power supply (SMPS) for 12 V or 24 V LED bars?
Sum the total wattage of all connected LED bars and add a 20%–25% headroom margin so the driver never runs at 100% thermal load (for example, an 80 W total LED load should use at least a 100 W power supply).
Why choose rigid aluminum LED bars over flexible adhesive LED tape?
Flexible tape adhesive can peel over time due to heat, whereas rigid aluminum-PCB bars act as a continuous heatsink, stay perfectly straight on shelves and maintain longer LED lifespan.
Should I pick a clear cover or a frosted (opal) diffuser on an LED bar?
Choose a frosted (opal) diffuser whenever the bar is directly visible or reflects off polished countertops to diffuse individual LED dots; choose a clear cover inside hidden coves for maximum lumen output.