Patent question PLEASE HELP?

ok so im trying to set up my very small online business of making LED lighting for aquariums and i ran across the most ridiculous patent ever. using LEDs over a marine tank. i cant believe someone can even patent that. thats like me saying im going to patent sleeping on a pillow. its really ridiculous.then theres another patent by the same company of placing LEDs on a flat surface and using electrical current to turn them on. another ridiculous patent. thats basically patenting turning on a light switch. and third is using one or more lights to create a hue of lighting in a liquid. so this company orbitec is really getting me mad. but my question is. i know commercial companies have to pay royalties to them but i built my own led fixture for my personnel tank. does this mean im breaking a patent. and say my friend wants me to build one for his tank am i breaking there stupid patent "the method of using LEDs over a marine setting"? and if I do decide to continue with my company how much are royalty charges and how does it work. do i need a lawyer or something or do i just pay them and thats it?