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💡How It Works & Setup
The lamp operates using an built-in magnesium fuel cell.When you add salt water, the saline solution acts as an electrolyte.This triggers a natural electrochemical reaction between internal metal plates (a magnesium anode and a copper cathode), generating an immediate flow of electrons that powers the high-efficiency LED bulb.It is essentially a fresh battery that you activate on-demand using water.
For optimal performance, add 2 teaspoons (approx. 10 grams) of standard table salt to 6 ounces (approx. 180ml) of clean water.Swirl or shake the unit gently for 10–15 seconds to ensure the salt is completely dissolved before turning the power switch on.
Yes! Clean, straight seawater can be poured directly into the lantern reservoir without adding any extra salt.If the ocean water has visible sand, seaweed, or debris, filter it through a clean cloth before pouring it in to maximize the lifetime of the internal components.
⏳ Longevity & Lifespan
A single fill of salt water will provide continuous illumination for approximately 100 to 120 hours. If the light begins to dim before that time, empty the old water, rinse the chamber briefly to clear out residue, and pour in a fresh salt water mixture.
Yes.Because the electricity is generated by a chemical reaction, the internal magnesium bar (the anode) slowly consumes itself over time.After roughly 100 to 140 total hours of cumulative use, the magnesium bar will dissolve completely and power generation will stop.To reuse the lantern indefinitely, simply unscrew the bottom drainage port, remove the old bar, screw in a replacement magnesium power bar, and add fresh salt water.
Stored dry and empty, the lamp has an indefinite shelf life of over 5 to 10 years. Unlike traditional alkaline batteries that leak, corrode, or lose their charge sitting in a closet, this fuel cell remains 100% stable until the exact moment it comes into contact with salt water.
🧼 Maintenance & Storage
You can turn it on and off anytime using the power switch.However,if you plan to turn it off for more than 24 hours, you must drain the salt water, rinse the internal chamber with tap water, and let it dry completely. Leaving salt water sitting inside an inactive lamp will cause the magnesium bar to continue degrading unnecessarily.
No.The byproduct of the reaction is a completely non-toxic magnesium sediment (magnesium hydroxide) mixed with common salt water.It can be safely poured down any standard household drain or disposed of outdoors without harming the environment.
🎁Customer service
We accept returns within 14 days of delievered. To start a return, visit our Returns page and follow the steps. If anything’s unclear, just reach out—we’re happy to help.
Once your order ships, we’ll send a tracking number to your email. To track it, head to our website, click “Track Your Order,” enter your number, and you’ll see where your salty package is and when it’ll arrive. Didn’t get an email? Check your spam folder or contact us—we’ll help right away.
Email us anytime at lantuzai@gmail,com. Our friendly support team is ready to help with anything you need.
We’re available Monday through Sunday, 9:00am to 6:00pm EST. Drop us a line and we’ll get back to you as soon as possible during those hours.
Product Questions
Each product page includes a detailed size chart. Check it out before purchasing to find your perfect fit.
Materials are listed under the “Details” section on each product page. Still unsure? Drop us a message and we’ll give you the lowdown.
Care instructions are included on each product page in the “Details” section. Follow them to keep your item in top shape for the long haul.
If we offer multiple colors, they’ll be shown on the product page. Don’t see the one you want? Contact us—we might have something coming soon.
Yes! All Hopen products include a 1-year limited warranty from the date of purchase. Peace of mind comes standard.
The warranty covers manufacturing defects, malfunctioning parts, and performance issues not caused by misuse or wear and tear.
Damage from accidents, water exposure beyond intended use, misuse, and normal wear (like used electrodes or accessories) aren’t covered.
Contact our support team with your order number, a short description of the issue, and photos if possible—we’ll take it from there and get things sorted quickly.
💳Payment Questions
Not right now, but it’s something we’re actively working on. Sign up for our email list to be the first to know when we launch flexible payment options.
Yes! We use industry-standard encryption to protect your payment details. Your info is safe, secure, and never stored without your permission.
🛫Shipping Questions
Shipping typically takes 8 to 15 business days worldwide. We ship from the USA and provide a tracking number as soon as your order hits the road, so you’ll never be in the dark.
Yes, we ship to P.O. boxes. Please make sure to provide your complete and accurate shipping address to avoid any delays in delivery.
🗣️Contact Questions
Email us anytime at lantuzai@gmail.com. Our friendly support team is ready to help with anything you need.
We’re available Monday through Friday, 9:00am to 5:00pm EST. Drop us a line and we’ll get back to you as soon as possible during those hours.
We love feedback—good, bad, or salty. Use our contact page or email us at lantuzai@gmail.com to share your thoughts. We actually read them!
