24V vs 36V Permanent Outdoor Lights

24V VS 36V PERMANENT OUTDOOR LIGHTS

24V vs 36V Permanent Outdoor Lights: Which System Fits the Project?

For professional permanent roofline lighting, voltage affects current, cable planning, connector selection, control-box configuration and installation scope. G&D SMART treats 24V as the core professional platform for many standardized programs, while 36V is a project-specific option for layouts that benefit from a higher-voltage architecture.

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Quick Comparison

These are configuration references, not universal run-length approvals. Final limits depend on fixture revision, actual load, cable route, connectors, branch architecture, control-box outputs, signal path and documentation.

Why 24V Is the Core Platform

24V offers a practical balance between current, component standardization and professional installer workflow. It also supports multiple current G&D SMART fixture families, making it easier to build a repeatable product range around common tracks, control-box planning, accessories and service procedures.

Why Consider 36V?

At equal power, 36V draws less theoretical current than 24V. That can be useful in a project that is deliberately engineered around 36V fixtures, 18AWG wiring, matched connectors and a 36V control system. The benefit should be confirmed with the actual layout and loaded-voltage test rather than assumed from voltage alone.

Do Not Choose Voltage by Distance Alone

A longer roofline does not automatically mean a higher-voltage system is better. A professional design also considers illuminated segments, unlit cable gaps, number of branches, control-box position, serviceability, certification requirements and the availability of matching signal hardware.

What About Wet Locations?

Wet-location suitability is separate from Class 2 and separate from voltage selection alone. For the current G&D SMART standard configurations, UL2468 wiring is treated as a Dry / Damp route. A Wet configuration below 30V requires an appropriately evaluated finished-product construction and suitable outdoor Wet-location wiring such as the approved project-specific SPT-W route.

Use Test Evidence, Not Only Theory

Review loaded voltage at the first and last fixtures, measured current, connector temperature and light consistency under the intended maximum operating condition. G&D SMART has published a measured C5204C 36V voltage-drop test example that can be used as technical reference alongside new project-specific validation.

36V measured test example → · Voltage Drop Guide → · Power Injection Guide →

Recommended Selection Logic

1. Start with 24V when building a standardized professional installer product range.
2. Evaluate 36V when the property layout or customer specification justifies a dedicated higher-voltage architecture.
3. Confirm installation environment and certification route before freezing wiring and connectors.
4. Validate the final branch layout with measured load and endpoint voltage.

Explore 24V → Explore 36V → Review My Layout →

Looking for the engineering detail? Read the 24V vs 36V technical comparison for current and wiring considerations, then use our system calculator to estimate your own layout. Calculated results are not certification or installation approvals.