Colorado's Stargazing Trail: What Dark Sky Certification Means for Outdoor Lighting Specifiers
The trail is a collaboration between the Colorado Office of Economic Development and International Trade, DarkSky International, Colorado Parks and Wildlife, and local partners across the Western Slope and beyond. Its launch during Colorado Dark Sky Month in June signals that dark sky friendly lighting is no longer a niche environmental concern — it is a statewide economic and tourism priority with infrastructure requirements attached.
What the Colorado Stargazing Trail Covers
The trail maps locations across Colorado that have achieved or are working toward International Dark Sky designation, including:
- International Dark Sky Parks — protected land areas that have met DarkSky International's standards for natural darkness and responsible outdoor lighting
- International Dark Sky Communities — municipalities that have adopted lighting ordinances meeting DarkSky International's requirements for full shielding, warm spectra, and controlled lumen output
- Stargazing events and programs — visitor-facing programming that depends on maintained darkness at participating sites
Key locations along or near the trail include the San Luis Valley, the Western Slope, Great Sand Dunes National Park, and numerous smaller municipalities and recreation areas that have pursued or are pursuing IDA designation.
What Dark Sky Certification Actually Requires from Outdoor Lighting
Achieving and maintaining IDA certification — whether for a park, a community, or a visitor facility along the trail — requires meeting specific, measurable outdoor lighting standards. These are not suggestions. Certification can be revoked if lighting conditions deteriorate.
| IDA Requirement | Technical Specification | Access Fixtures Solution |
|---|---|---|
| Full shielding | Zero lumens above 90°; BUG rating U0 (zero uplight) | Full-cutoff area, parking lot, and pathway luminaires |
| Warm color temperature | 2700K (warm white) maximum for most park and community zones | Selectable 2700K–3000K on qualifying fixtures |
| Minimum necessary illumination | Footcandle levels matched to task; no excess output | Photometric studies by lighting engineers |
| Adaptive controls | Dimming or shutoff during low-use hours; motion sensor or timer | 0–10V dimming and motion-activated control options |
| Wildlife-safe spectra | Warm white or amber; avoid blue-spectrum sources near habitat | Warm white LED and Amber 590nm (Color Temp filter) options |
For visitor centers, trailhead parking lots, campground lighting, and public restrooms along the trail, these requirements apply to every fixture — including retrofits triggered by renovation or maintenance work.
The Economic Case for Getting Lighting Right
The Colorado Stargazing Trail is not purely an environmental initiative — it is an economic development strategy. Astrotourism is a measurable and growing segment of Colorado's outdoor recreation economy, and IDA-designated locations command visitor traffic, media attention, and grant eligibility that non-designated areas do not.
Municipalities and park managers pursuing or maintaining IDA designation along the trail have both a regulatory and a business reason to specify correctly. Non-conforming lighting is not just an ordinance risk — it is a threat to the certification status that underpins the tourism value of the location.
Applications along the Colorado Stargazing Trail
Trailhead and Campground Parking Lots
Full-cutoff LED parking lot luminaires at 2700K with motion-activated dimming — providing safety for late arrivals and early departures without contributing to skyglow in adjacent dark sky zones.
Shop Parking Lot Lighting →Visitor Center and Restroom Lighting
Fully shielded wall packs and area lights for visitor facility exteriors — warm white, full cutoff, and dimmable to meet IDA fixture requirements at park and community certification sites.
Shop Wall Pack Lights →Trail and Pathway Lighting
Low-level, full-cutoff pathway luminaires for paved trails and interpretive areas where wayfinding lighting is needed without disrupting the darkness that makes the site worth visiting.
View Area and Pathway Lighting →Municipal Street and Area Lighting
For IDA Dark Sky Communities along the trail, full-cutoff street and area luminaires at 2700K that meet community certification lighting ordinances while delivering safe, reliable public illumination.
Browse Outdoor Lighting →Planning a Dark Sky Friendly Lighting Project in Colorado
Whether your project is a trailhead retrofit, a visitor center expansion, or a municipal streetlight upgrade in an IDA Dark Sky Community, the specification process starts with understanding the photometric requirements for your specific site and use case.
Access Fixtures' lighting engineers provide photometric studies that model fixture performance against IDA standards — giving municipalities and park managers the documentation they need for certification applications and permit submissions.
What a Photometric Study Covers for Dark Sky Projects
- Footcandle levels at grade across the coverage area, verified against minimum-necessary standards
- BUG (backlight, uplight, glare) ratings for each proposed fixture confirming U0 uplight classification
- Color temperature and CRI documentation for IDA certification submittals
- Fixture spacing and pole height recommendations to minimize overlap and excess output
- Control zone mapping for dimming schedules and motion-sensor activation areas
A note on terminology
Access Fixtures describes products as "dark sky friendly" and notes where fixtures "meet most local ordinances" — rather than claiming blanket IDA certification or regulatory approval. IDA certification is a site-level designation, not a fixture-level one. Always verify current IDA requirements for your specific designation category with DarkSky International before finalizing specifications.
External Resources for Colorado Dark Sky Projects
Spec Your Colorado Dark Sky Lighting Project
Our lighting specialists and engineers work with Colorado park authorities, municipalities, and visitor facility managers to develop fully shielded, IDA-friendly outdoor lighting systems — from photometric studies to final fixture specification.
800-468-9925