As the titles says I'm wanting to gut and retrofit the light I recieved with my 20gal High tank. the light is about 22". I am on a very tight budget as it is and what im looking for in terms of wattage is 35-45wtts. I did some searching on here bought diy retrofit lighting that would work for me and i found none. So I ask you please help me out, this will be my first diy project. As for the way of cost $30-$40.