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Solatube Highest Performance Guarantee
All day long. All year long.

Highest Performance Guarantee
Thank you for purchasing a Solatube Daylighting System featuring breakthrough technology for higher performance. Solatube International, Inc. guarantees that when using the Natural Effect Lens**, the 160 DS and 290 DS Daylighting Systems deliver more Average Daily Light on an Annual Basis (as determined by the methodology set forth below) than other passive tubular daylighting devices having the same "L over D ratio" (as defined below) that are widely commercially available on the market at the time of your purchase. We are totally confident that no other product offers the total annual performance of a Solatube product. We will give you YOUR MONEY BACK (retail purchase price) if you find such a product.

Limitations on Guarantee
Guarantee offer applies only to products purchased for personal use. Offer is only valid for products assembled and installed according to manufacturer's specifications. Offer excludes new products manufactured by Solatube International, Inc. The guarantee excludes all other products, except Solatube 160 DS and 290 DS products, manufactured by Solatube International, Inc. Offer expires one year from product purchase date.

Methodology for Determining Average Daily Light on an Annual Basis (ADLAB)
The ADLAB is determined by measuring the light output of a system at each hour during daylight hours on the 21st day of March, June, September and December. To determine the ADLAB, these measurements are then added together and divided by the total number of measurements taken. To compare ADLABs, the systems compared must have the same ratio of Length of daylighting tube divided by the Diameter of the tube opening. This is called the "L over D ratio." Testing must be completed by a certified testing agency.

To Make A Claim
If you believe that you have found a qualifying product that outperforms your Solatube Daylighting System, please send a written refund request with your original purchase receipt with the Solatube product circled, and written test results from a valid testing agency to Solatube International, Inc., Attn: Performance Guarantee, 2210 Oak Ridge Way, Vista, CA 92081. Requests must be postmarked within 365 days of purchase date. Solatube International, Inc. reserves the right to audit any testing or to retest to confirm results.

How State Law Applies
This guarantee gives you specific legal rights, and you may also have other rights which vary from state to state.

*Limited Guarantee


**The Natural Effects Lens does not come standard in all kits.