BENZYL CHLORIDE via free radical halogenation PART 1

This is an "IN DEPTH !!!!!!!!!!" talk about the benzyl chlorination of toluene via free radical halogenation to make benzyl chloride and benzyl dichloride (benzal chloride) and benzyl trichloride (benzotrichloride) and how to hydrolyze them to benzyl alcohol and benzaldehyde and benzoic acid. PART 1 ... I talk about 3 VERY SIMILAR reactions that add functional groups to a benzene ring. The 3rd reaction is adding chlorine to the benzene ring. I discuss why sometimes chlorine adds to the ring and why sometimes the chlorine adds to the benzyl position. I discuss the apparatus needed for free radical chlorination and the mechanism and why the benzyl position is such a good position for free radicals to attack there. I discuss the UV types and which types make it through the ozone. I discuss my GUESSES on what wavelength of UV is needed for the experiment based on what wavelengths make it through the ozone. I talk about light intensity or brightness. PART 2 i do the math and find out a big SURPRISE about what wavelength light should really be used for toluene (BENZYL) chlorination. CAUSE IT IS NOT UV