In this context of this thread, this is an awesome resource! Newbie here, but I just learned about CRI. Your tool is very featureful for a tech/power user.

If you want a text wall of UI suggestions: Move the top buttons to a left side menu that always-show their checkboxes (like newegg/amazon), so that the button meaning can be learned from its options. Perhaps describe every item with hover text (eg title attrib). Perhaps put CRI in the product description, since everyone seems to care about it. Combine weather-resistant/weatherproof/water-resistant to whatever degree possible. I couldn't find any waterproof high-CRI, for what that's worth. Another idea is a "purpose" category where you could decide what features would be ideal for things like hiking, backpacking, swimming, home use, car use, etc.