Coastal Source Outdoor Lighting: A Complete Guide

Coastal Source is the outdoor lighting brand that professional landscape architects and high-end AV integrators specify when they cannot afford for the outdoor system to fail. Restrepo Innovations is an authorized Coastal Source dealer. which means we carry the full product line, provide factory-backed installation, and extend the manufacturer warranty to our clients. This guide covers what makes Coastal Source different, how their system is structured, and how it integrates with whole-home automation.

Why Coastal Source Exists: The Problem With Standard Outdoor Lighting

Standard outdoor lighting products. even premium-branded ones from lighting showrooms. are designed and tested for typical outdoor environments: rain, temperature variation, UV exposure, and occasional freeze-thaw cycling. They are not designed for the environments that destroy them fastest: salt air within a mile of the ocean, standing water in low-drainage landscapes, and the 15+ year performance window that luxury estate owners expect before any fixture requires refinishing or replacement.

Coastal Source was founded specifically to solve this problem. The brand’s engineering brief was simple: build outdoor fixtures that survive in the worst coastal environments without maintenance requirements that exceed the homeowner’s tolerance. The result is a product line built from marine-grade aluminum alloys, 316L stainless steel hardware, and fully sealed transformer systems that competitors cannot match at any price point.

The Coastal Source System: How It Works

Coastal Source products are not sold as individual fixtures. they operate as an integrated low-voltage lighting system. The ecosystem consists of:

Multi-tap transformers: Coastal Source transformers are engineered specifically for their fixture line, with output voltage taps matched to the cable runs and fixture loads in their product catalog. The transformers include built-in surge protection, thermal resetting, and timer/photocell controls. Transformer capacity ranges from 150W to 900W per unit. For large estate projects, multiple transformers are zoned by lighting function or landscape area.

Fixture lines: The Coastal Source catalog includes path lights, bullet uplights, well lights (in-grade), step lights, wall fixtures, area lights, and specialty underwater fixtures. Every fixture in the line is compatible with the transformer system and rated for marine-grade outdoor installation. The bullet uplighter series is the workhorse for residential tree and architectural uplighting; the path light series is the standard for estate walkways and garden lighting.

Cable system: Coastal Source specifies 12-gauge direct burial cable for their system, which maintains voltage within acceptable range at longer run lengths than the 14-gauge cable used by competitors. Proper voltage at the fixture is essential for consistent color temperature and output level. low-voltage LED fixtures that receive undervoltage produce warmer, dimmer output than specified.

Marine-Grade Durability: What It Actually Means

Coastal Source’s marine-grade specification translates to specific material and finish choices at every component level. Fixture bodies are cast from LM6 marine-grade aluminum, which is significantly more corrosion-resistant than the standard die-cast zinc or lower-grade aluminum alloys used in competing products. All hardware (screws, mounting brackets, lens retainers) is 316L stainless steel. the grade used in marine deck fittings and medical instruments, not the 304 grade that surface-rusts in salt-air environments within 2–3 years.

Fixture finishes are powder-coated with a multi-stage preparation process that includes chromate conversion coating before powder application. This process produces a bond between the finish and the aluminum substrate that resists delamination, chalking, and UV degradation at a level that standard powder coat cannot match. The result: Coastal Source fixtures retain their appearance for 15+ years in exposed coastal conditions where competing products require refinishing within 5 years.

Lighting Design With Coastal Source

As an authorized dealer, Restrepo Innovations designs Coastal Source installations using the brand’s professional design tools alongside our own lighting plan process. A typical estate outdoor lighting project includes:

Zone definition: Security zones (motion-activated, full brightness), architectural zones (timed to sunset-to-off or midnight dimming), entertainment zones (scene-controlled via Crestron), and safety zones (always-on at reduced level).

Fixture selection: Bullet uplighters for trees (15° beam for palms and columnar trees; 36° for broad canopy trees); path lights at 8–12 foot spacing for walkways; step lights integrated into every riser on outdoor stairs; well lights for in-grade applications where above-grade fixtures would create obstruction.

Transformer zoning: Each lighting function gets a dedicated transformer zone for independent control. Security lighting on Zone A; architectural on Zone B; pool/entertainment on Zone C; path/safety on Zone D. Crestron controls each zone independently through relay contacts integrated into the transformer system.

Crestron Integration

Coastal Source transformers include 12V accessory ports and timer/override inputs that interface directly with Crestron relay outputs. This allows outdoor lighting zones to participate in whole-home automation scenes without requiring a separate control system for outdoor lighting. A “Party Mode” scene can simultaneously activate pool lighting, entertainment zone uplighting, and pathway safety lighting while indoor scenes set mood in the entertainment spaces. A “Secure” scene at 11 PM can reduce architectural uplighting to 30%, maintain pathway safety lighting, and arm security motion sensors simultaneously.

For the complete landscape lighting zone design framework, read our companion post on landscape lighting zones and curb appeal. For how outdoor lighting integrates with the full residential lighting system, see our luxury lighting design hub. For fixture type guidance applicable to the outdoor environment, see our post on fixture types and when to use them.