What makes our lights shine brighter and better than the competition… ● Patented technology with a non corrosive bottom. Keeps lights lasting longer. ● CANCER FREE- The only bulb that is prop65 free ● Watertight – most bulbs let water in over time….not ours! ● UV coating – to protect against the damage from the sun. ● 3 year warranty. The short and skinny is our bulbs are brighter, higher quality, last longer, and are safe for you and us to handle. Conclusion….they are the best bulbs in the industry….GUARANTEED!