Replacing Coralife Biocube 14 Lights for LEDs

Hello I have a biocube 14. And want to upgrade the lighting. How do I do this is there any step by step directions out there and I want to do LED for better lighting also should help avoid the heating problems with the coralife biocube 14.

Which LEDs would be good in a biocube 14? Any step by step instructions out there?

Also I would like some that fit in the original hood would like to keep the hood.

Thanks.