lax_def43

I am designing and building a lighting system for my 75 gal saltwater aquarium. Right now, I'm just finding the parts I would like to use.

I want to have 2 48" 96W power compact lights in my hood and obviously need a ballast for them. Are there ballasts specifically used for PC lights? Or do I find any kind of ballast that matches the wattage?

I wanted to have a lighting unit for my aquarium made of LEDs (I know how to do DIY LED projects so that's not the issue). I wanted to know the proper wavelengths for morning, mid-day, and evening colors. Is some UV helpful too? I only need proper lighting for live rock and possibly some macro

I want to use an old, wall-mounted nokia cell phone charger for a small LED lamp project and I can't find out if the charger is AC or DC. Any help?

I was starting to plan a DIY project. It is an ambient light lamp with about 30 to 40 LEDs. For so many LEDs, a DC battery source isn't logical and I was wondering if I could use an old cell phone charger. With the charger (and some EE experience), would I be able to make this lamp? Are there any components I would need besides LEDs and resistors?

I was hoping to connect approx. 40 blue or green (2.5V) LEDs off of a power source (possibly 9V battery). How would I design a circuit of LEDs and resistors to maximize battery life and have an average brightness from the LEDs?

I have heard it is left to slightly more experienced aquarists to have coral in their saltwater aquariums, but I was interested in starting a saltwater aquarium with anemones.

Is it easier/ just as difficult to take care of anemones in a saltwater tank with some fish in it? (the usual clown or two and some damsels) Do you need the same equipment as a tank with coral?

I was wakling through a slightly more exotic fish store the other day and saw that they had a Volitan Lionfish for sale. Immediately I wondered, if someone bought this lionfish, how would they get it out of the tank at the store and into the tank at home?

With their spines, I figured it could potentially be dangerous to 1) put any part of your hand or arm in the tank or 2) scoop it with a net as its spine might get caught and hooked up in the netting.

Anyone have any answers?

does

sin(37 degrees) = sin(30 degrees) + sin(7 degrees)

?

no government conspiracies please

I am 5'10", 195 lbs. I have been trying to lose some weight just for the sake of it and I am having a hard time trying to lose some fat in my chest.

Right now, I prefer to do power lifting on free weights and some cardio when i go to the gym. I don't want to stop my power lifting, so are there some excersizes that can help shrink the size of my chest?

I WANT A LACROSSE PAGE UP HERE!!!

Has anyone else heard of this/ taken the class? Please give me some input to see what it might be like elsewhere (you know, like if it drives less students insane, actually has SOME effectiveness, etc.)

Any ideas on how to alphabetize a list of names as string variables?

I've seen online to take hardwood that would not hurt the environment and boil it for about a day (replacing the water to remove tannins). Anyone had any personal experience with some pointers? And if so, what about local aquatic plants too?