We use this as cabin lighting at sea to conserve electricity and for back up for when electric fails. The lamp does well in normal seas. I have not been in over 25ft waves with this lamp, so do not know how it would react then. Not quite bright enough for a good reading lamp, but is much brighter and safer than candlelight. Easy to fill, but do not overfill or it will leak a bit from the wick. Make sure there is enough room, or insulate a bit, for heat above the lamp smoke bell.
I have owned many oil lamps that this is the best of them for overall lighting (and heating) for the small cabin on my Pearson Ariel. This lamp has just the right combination of capacity and size. It will burn for (slightly less then the listed 24 hours) with a properly trimed wick. I also like that the well is heavily weighted so the lamp stays stable in a seaway even if it is empty of oil or nearly so. Good lamp.