materials justification

i have chosen to make my light out of aluminum and acrylic plastic. aluminium is a cheap non-corrosive metal which is malleuable and can be easily cut. it is good because its not corrosive so it cannot rust or corrode. the aluminium is going to be used for the body of the light. i am using transperant clear acrylic plastic for the light output. i am using this because it is very easy to work with and it can be very easily cut in the cam machine. this plastic has a high level of transperancy and can come in a range of different colours. it is also cheap