QUOTE(GrizzleBee's @ Nov 21 2006, 06:15 PM)

Wow the moonlight thing is awsome. The 29.5 day lunar cycle reminds me of this
Lunar Tracker device- except it looks like you took it to the next level by figuring in accurate moon rise/set times. Do you manually adjust the intensity with the dimmer? what exactly is TLAR?
I'm actually in the planning phases of building an intertidal setup which will mimic tidal cycles, and since the tides coincide with lunar phases, it'd be cool to combine the two using a computer or some type of controller... I have no idea how to do that, so if youve got any suggestions, Im all ears
your tanks lookin great BTW
Thanks for the comments! I think it would be fairly easy to do this with some type of controller, but you'd need a computer to feed the controller the tables of illumination and rise/set times from those webpages. I don't know, but that type of device may not be in existence yet. Yes I will manually adjust the intensity with a dimmer--see below.

TLAR = that looks about right. You could actually do this with your intertidal pool model. You'd need to use the same tables and come up with weekly averages like I did. When the moon rises and is overhead, the tide would have to also rise or become active (depends how you want to do your "pool"). Then every week along with regular maintenance, adjust it for the next week's lunar cycle with rise/set times and illumination. This will be a simple manual controller for these parameters changed by the user. You could even get real nitpicky and set them daily, but personally I think that would drive me crazy.

Ok, I picked up some items from Home Depot to continue this little side-project. (1) a double gang box, (2) a 15 amp outlet, (3) a push-on/off dimmer--cheapest one HD had ($4.95), (4) an dual outlet outlet/switch cover, and (5) a 6' non-grounded extension cord. I cut the outlet off the extension cord for the cord and plug. From there it was simple electrical work of mapping the hot wire (black) out of the wall outlet, through the extension cord, through the dimmer, through the outlet, then the neutral wire (white) through the extension cord and back to the wall outlet. I put it all together, attached it to the wall, and drew lines on the cover with a Sharpie where the lowest and highest settings were. From there I used TLAR. I halved the clockwise rotation of the knob from low to high and drew a line (2), then quartered the two halves into two other power settings (1 and 3). All four quarters were again halved for intermediate settings. Now I have 5 major power settings (LO, 1, 2, 3, HI) with 4 minor power settings. From there I plugged the dimmer's cord into the lunar light timer and plugged the lunar light into the dimmer's outlet. Confused yet? Here's what it looks like with everything installed.

By using the tables from my previous research, I designated LO as my lowest value and HI as my highest value. Below are pictures of each setting. Picture 1 is LO (10%), Picture 2 is Setting 1 (30%), Picture 3 is Setting 2 (50%), Picture 4 is Setting 3 (70%) and Picture 5 is HI (90%). Those minor power settings equate to 20, 40, 60 and 80% respectively.





Now the tank is actually not that bright, I had to set one of the variables constant--exposure time--to be able to show you, the audience, change in illumination. Picture data for each is Aperture 3.2, Focal Length 12mm, Exposure 10 seconds, ISO 64, No other light source. Questions?