Brian, Thank you for reaching out to us. We would love to switch these out for you. Please feel free to call us at (888) 301-0332 and we will be happy to help.

We are sorry to hear some of your lights didn't work, KJ. Brightness and duration depend on weather conditions and the season, and they are required to be placed under direct sunlight without any coverage for 8 hours a day. Please know these lights are covered by the Member's Mark 100% Satisfaction Guarantee and can be exchanged or returned anytime.

Our light is 25 lumens. If you need more bright(lumens), we will discuss with the merchant of Sam's Club whether they are going to carry more bright disc light, if yes, we will advise you.However, our disc lights are the brightest in this disc light category of USA market so far.The cloudy weather and other night time light sources may effect its performance. Please ensure the solar panel receives over 6 hours of direct sunlight everyday to re-charge the solar rechargeable battery in each unit to reach maximum output. For more information, please contact us at ting.shen@questwood.asia Thank you, Ting