Let's do an information extraction task.

comments: this a a really nice head head light it is really bright and I can see at night with this the red light setting is pretty good to also has a strobe setting where one of the lights flash

Step 1, extract descriptions exactly from comments that describe the goods.
Step 2, filter negtive descriptions.
Step 3, filter unspecific descriptions like "nice", "goods", "great", etc.
Step 4, filter descriptions like "looks like picture", "looks like photo".
Step 5, filter descriptions not related to color/shape/material/size/pattern/usage scenario/style.
Step 6, convert each description into adjective.
Step 7, shorten each remaining description as short as possible.
Finally, 

Only give the final answer.