Your right there not very efective alone,I'm from the ole school of hand signals and have on pretty much for at night,My reflective gloves only have reflective stuff on top.
STORY
Had this guy on some metric twin beside(left) me at light couldn't figure out why he was staying in a bad spot ,Seemed he wonted to get over to my right side to turn right ,STORY I didn't see his lights (tail lights only),till after he turned same azz light i HAVE.......
I have sone stk.light off mine there not the fish bowl type lens,but have like 4pr.,Don't think I have any bigg spacer though,I cut my stk.1s and paintedMoved (pic.) .but as said have housing and lens ,Price of shipping were ya at.