Solid-State Lighting (SSL)

06 - 09 November 2017
National Center for Atmospheric Research, Boulder, Colorado United States

Travel & Tranportation

Located 35 minutes northwest of Denver, Boulder is a captivating community enriched with natural beauty, hip urban culture and a vibrant love of the outdoors. Visit Boulder and experience its distinct lifestyle overflowing with restaurants, inspired shopping and art, and miles of hiking and biking trails.

Shuttle Bus Service to Meeting Location

OSA will offer shuttle service from the Millennium Harvest House Hotel to the meeting locations (NCAR and Mesa Lab Visitors Center).  The shuttle stop at the hotel will be mark with an OSA sign. Please allow 20-30 minutes travel time from the hotel to NCAR and 30-40 minutes travel time to Mesa Lab Visitor Center.
From Millennium Harvest House Hotel to NCAR
6 November - 7:00—10:00
7 November - 7:00—10:00
8 November - 7:00—10:00
9 November - 7:30—10:30
From NCAR to Millennium Harvest House Hotel
6 November - 16:00—19:00
7 November - 11:00—13:00 
8 November - 16:00—19:00
9 November - 11:30—13:30
From Millennium Harvest House to/from Mesa Lab Visitor Center
7 November - 15:00—17:00 and 18:00—22:00
Individuals requiring letters of invitation to obtain travel visas may access the online form at Invitation Letter Request Form.

Important information regarding Visa Invitation Letters:
  • Your name must be listed exactly as it appears on your passport. Any differences between the name on your passport and the name on your invitation letter or other documentation could lead to a delay and/or denial of your visa.
  • If you are presenting a paper, include the title and session in which the paper will be presented.
  • Please note that each individual requesting an invitation letter must fill out a separate form.
  • All letters of invitation will be sent by a locked PDF unless otherwise requested. If you require a paper copy please provide a courier account number or credit card number with expiration date with the original request.
  • Please allow up to 15 business days to process your request.
  • OSA Management reserves the right to request further information regarding the company or affiliation of the attendee to ensure the validity of requests. Meeting attendees do not need to wait until your paper is accepted to request a Visa Invitation Letter.
  • OSA is unable to contact U.S. Embassies in support of an individual attempting to gain entry to attend a meeting.
  • We recommend that you secure your travel visa before registering for the conference as cancellations after the preregistration cutoff may result in a cancellation fee.

For questions about the Visa Invitation Letter application process, email
Apply now for your US Visa

If you need a travel visa, begin the visa application process now! The application process can take up to 6 months or more. We strongly encourage you to apply for your visa as early as possible, but no later than three months before you wish to enter the United States. Strict security requirements may cause delays in visa processing. More information about applying for a United States visa is available at U.S. VISAs.
Online Resources:
U.S. Customs and Border Information
VWP and ESTA Frequently Asked Questions
U.S. State Department Visa Information
Department of Homeland Security
National Academies International Visitors Office
ESTA Application
ESTA is an automated system that determines the eligibility of visitors to travel to the United States under the Visa Waiver Program (VWP). Authorization via ESTA does not determine whether a traveler is admissible to the United States. U.S. Customs and Border Protection officers determine admissibility upon travelers’ arrival. The ESTA application collects biographic information and answers to VWP eligibility questions. ESTA applications may be submitted at any time prior to travel, though it is recommended that travelers apply as soon as they begin preparing travel plans or prior to purchasing airline tickets.

Travel by Air

The Millennium Harvest House Boulder hotel is located just 42 miles from the Denver International Airport.

Transportation From Airport

Shared-Ride Services
Shared-ride service, also known as commuter shuttles, operate regularly from Denver International Airport. Individual operators may provide pre-arranged, on-demand, and/or charter services to locations within the Denver metro area and the state of Colorado. Shared-ride service shuttles pick-up and drop-off from Jeppesen Terminal Level 5, island 5, outside doors 505-507 (east side) and 510-512 (west side).

Green Ride Boulder is a shared ride service to/from Denver International Airport. OSA Congress attendees can receive the special rate of $30USD each way by making a reservation through the special link.  

Regional Bus
The AB SkyRide provides bus service between downtown Boulder and the Denver Airport Station for $9 each way. You can find the bus at Gate 6 at the Denver Airport and it will take you to the Downtown Boulder Stations, which is close to the hotel. 

Taxi Cabs
Taxicabs are readily available at the Denver Airport. Taxicabs pick-up and drop-off from Jeppesen Terminal, Level 5, Island 1, outside Doors 505, 507 and 511 (Terminal East), and Doors 506, 510 and 512 (Terminal West). Flat Rate Charges of $88.57 to the Boulder area.  

Rental Cars
Denver International Airport has over than 10 major rental car companies. The shuttles pick-up and drop-off from Jeppesen Terminal Level 5, Island 4, outside doors 505-513 (east side) and 504-512 (west side).
Light, Energy and the Environment attendees get a special discount with Avis. Visit their website to reserve your car.


UnitedUnited Airlines is offering discounted fares for all our conference Attendees. You may book online at "Book United Meetings Travel" and enter ZXJP194880 in the Offer or Tour Code box when searching for your flights. If booking through a travel professional or United Meetings at +1 800.426.1122 (FREE), please provide them with the following information: Agreement Code 194880, Z Code: ZXJP. This code is valid seven days before and after the conference at destination airport.

Delta Delta Airlines is offering discounts for domestic and international flights when using the following global meeting code:  NMPDC. This code is only valid at destination airport five days before and after the conference. Reservations and ticketing are available via or by calling the Delta Meeting Network Reservations at +1 800.328.1111 +1 800.328.1111 FREE. Please note that a Direct Ticketing Charge will apply for booking by phone. When booking online, select "Advanced Search" option and enter your Meeting ID Code in the box provided on the Search Flight page. 


AVis Avis Rent-a-Car is pleased to offer low rates with unlimited mileage to participants attending the conference. If you wish to reserve a car please contact Todd Alexander at +1 800.525.7537 Ext. 35003 or the Meetings and Convention Department at + 1 800.525.7537. They can ensure that you maximize your rental dollars. Please mention AWD # D340737 when you call. Reservations may also be made on the Avis website.  
World Wide Telephone Numbers
The Avis Worldwide Discount (AWD) Number is D340737.
NOTE: This code is valid seven days before and after the conference.

AmtrakAmtrak offers a 10% discount off the lowest available rail fare to the meeting destination up to three days prior to the meeting start date and three days following the last day of the meeting. To book your reservation call Amtrak at 1 (800) 872-7245 or contact your local travel agent. Please refer to Convention Fare Code X36D-961 when making your reservation.

November Weather in Boulder: 

Average High Temperature: 54°F (12°C)
Average Low Temperature: 29 °F (-2 °C)
For the most current weather forecast, please visit the weather page. 


Standard 120v/60Hz voltage electricity is used in the United States. Learn about international electricity and see photos of the adapters and transformers you need for your appliances. 


The US Dollar (USD) is the currency of the United States. Credit cards are widely accepted; VISA and MASTERCARD are most popular. Traveler’s checks are accepted at currency exchanges or banks, but are not as widely accepted. View the latest currency exchange rates

Time Zone:

United States/Boulder is Mountain Time Zone.

Tucked into a picturesque valley below the iconic Flatirons, Boulder hosts thriving tech and natural foods industries, supports a renowned entrepreneurial community, has some of the region's best restaurants, and is home to many federal research labs and a world-class university. No wonder this Rocky Mountain town of approximately 107,000 people is a world-class destination.
Have Fun
There are endless ways to enjoy Boulder's 300-plus days of sunshine a year — from the hundreds of miles of hiking and biking trails to some of the best rock climbing spots in America. Take a leisure walk with the family down the historic Pearl Street Mall, rent a B-cycle bike and ride along the 300-plus miles of bike paths, or relax by Boulder Creek and take in the sights and people. 

Get Outside
Boulder has preserved more than 45,000 acres of open space, much of which surrounds the city and helps maintain its geographical boundaries. There is over 150 miles of trails abound for nature lovers. Chautauqua Park, on the west end of Baseline Road, is one of the remaining few functioning Chautauquas left in the country following that historic adult education movement. The area has many parks to explore, inluding one of the unique and diverse bike parks in the nation, Valmont Bike Park. There are many interesting places to visit such as the Flatirons

Soak Up the Flavor
Boulder is known as a "foodie town"  and "the Napa Valley for Craft Brewing". You can easily grab a bite to eat at any one of the many award-winning, restaurants.  In Boulder alone, there are dozens of some of the country's finest microbrews. The city also has nearly 50 coffee and tea shops. Visit brick paved streets of Pearl Street. Stroll-worthy Downtown Boulder is a great place to start exploring.

Discover Boulder
Things to Do
Travel Guide and Apps
Vacation Planning Guide