Just curious but do you get any convection currents akin to the original lava lamp?
LOL, not in that way ..... the bottom glass of the lava lamp and the heatsink don't give enough heat transfer for cause convection currents (i'm trying something similar from some weeks, using both an SF-AW and a 445nm one, and also with the 445nm at half watt, no movements)
Is for this reason that, actually, i have stopped my build ..... i had a different idea, different from jander one, i mean, to left some of the original liquid in the lava lamp, together with "glittering" particles (like the ones in the attached image), and to use a defocused (for safety reasons
) beam for have it reflected anywhere from the "glitters" ..... only, there's no convection current, and all remains steady .....
I need to find a way for transfer heat to the liquid without use a lamp (i also considered to use a heater wire, but i want to build it with the less possible consumption), using the heat generated from the diode itself (and using the liquid as cooler, too) ..... i thoughd to use a plastic tube (plexiglass), instead a glass bottle, as lamp body, and place the diode module inside the tube, in contact with the liquid ..... only, i need first to find a decent (and long-time efficent) system for seal totally the module-diode-lens part ..... need not just to make it waterproof, but also to find a glue that can resist at long-time immersion in oily liquids, and to heat deformations ..... til now, i tried some different epoxy resins, but all them failed in the time ..... still experimenting.
BTW, about the marker fluo ink add-on, i suspect that, with that 405nm setup of jander, adding just half drop of yellow fluo ink to the bottle can turn it in a bright glowing lamp .....