Oops, let's see how it goes.

Hello there! Light bleach / light stress, light burns are the terms used for this family of issues, no need to worry too much on that, just move your lights away. The affected buds that turned white often mistaken as white cannabis, starts to loose potency or have no potency depends on the severity. So this trichomes info sounds strange. A few things to keep a look on are your temps too, to make sure you don’t have heat stress... There is a technique i had tried before called Back Building, you can have a look on that, basically is a HST technique that makes the plant focus the energy also in the lower buds, have a look on the timing is made also so you do not compromise the growth since you are making an auto. Happy growing, cheers!