What kind of power source will you have available? Wall outlet? Batteries?
How bright are we talking? Does this thing need to shine like a beacon of super-light in the daylight, or just be "glowing?"
How much room underneat will there be? If it can sit on a box, there would be room for heat sinking and batteries, you could build something withat least a thousand lumens. This cylinder is approx 7 X 3 inches (is the 75mm the diameter?), and the LED would be on the bottom?
You could put any one of a number of LED's under there, and push it moderately hard. I'm thinking taking a light with a P7, remove the head and reflector, pushing at about 2.8 amps, you'd have 800 ish lumens in a "flood" that, if up against the bottom of the cylinder, would light it up oretty nicely, albseit with some light lost. You could make a simple blcok out of paper or cardboard to stop the spill. Of course, you could also place the cylinder an top of an appropriately sized relector to focus all available light up and in.
If you do not want it sitting on a light, there are drop-in modules that could be attached to the bottom of the cylinder (I'm thinking the old malkoffs with the giant heat sink) and have wires running to a battery source.
Something like a corn syrup filled cylinder with a RGB (red green blue) LED at the bottom (and/or top) would be interesting. Also, you could just use a blue and green LED separately, probably for a bit less money and easier wiring.
I'm curious as to why you want to use corn syrup. isn't a bit yellow? a bit like honey? but the syrup will be to thick as im also using a pump to blow bubbles in the liquid.
i can't seem to find much specs for the leds on DE except for the RGB one. it uses 350mah per color. Do you think that a 350mah led is sufficient? would be nice, because i have to power more stuff of the batteried
Ohh ... you could fill the volume with shower gel ... you've got an endless pick of colours and could dilute it down to get whatever shade you wanted.
If you could get bubbles going it's become a little like a lava-lamp!
Don't forget to put pic's up ... I'm intrigued!!!
Also regarding lighting it up ... I'm a newbie too and am doing a light where I've chosen a Taskled driver and a Cree MC-E (alternative to the SSC P7).
The reason for Taskled is that they look lot more reliable (albeit a bit more pricey) than some other sources.
@Jonster, Shower Gel or water with gelatin, just thick enough for bubbles to form and slowly rise to the surface... nice touch! Okay, I shall post some pics will take some time though since DE can take up to 2-3 weeks to deliver.
@bshanahan14rulz, No unfortunately I won't have room for a power supply and a HID kit.
Originally Posted by bshanahan14rulz
...a 50% duty cycle low frequency PWM with bubbles...
Do you mean by low frequency that the light be dimmed to 50% or that the LED goes visibly on and off all the time ?