For any LULC change detection study, the primary objective amongst others is to identify the changes which have occurred over a particular area. Therefore the object of interest is to identify the changes in land cover/land use and not the changes caused by atmospheric or radiometric effects or any other artifacts. As you know, when a satellite looks down on the earth, it also looks through a column of atmosphere which in a way obstructs the field of view of the satellite sensor before it senses the objects on the surface of the earth. Surface reflectance products as the name suggests are already corrected for radiometric and atmospheric effects. These pre-processing (radiometric and atmospheric corrections) steps which you anyway would have done with a normal Landsat product (Level 1 or Level 0) for carrying out a LULC change detection study, is now already been done for you when you use a Surface Reflectance products (Level 2 and higher).

As these Landsat Surface Reflectance products are provisional, I would suggest you to manually carry out pre-processing steps and then compare your results with the Surface Reflectance products. Also go through the product guides for details.

http://landsat.usgs.gov/documents/Provisional_Landsat_8_SURFACE_REFLECTANCE_EE.pdf

http://landsat.usgs.gov/documents/cdr_sr_product_guide_ee.pdf

Do it manually using conventional methods

I agree with James and Sanjoy.  I addition, you may want to check this Q&A about surface reflectance products.

https://www.mapbox.com/blog/ledaps-for-better-landsat-imagery/

DOS or FLAASH in ENVI will do.

You need to download Colletion 2 Level 2 products, and use scale factor:

https://www.usgs.gov/faqs/how-do-i-use-a-scale-factor-landsat-level-2-science-products

The video is an example for sentinel 2, but the procces is the same for Landsat 5,7,8,9.

https://youtu.be/Jo8j6w18KlM?feature=shared