NL50 - 4bet light with 89

[bazooka87]

I really can't remember 4-betting light in...forever, and this seemed like a decent situation to do it. Villain running at 28/24/9 over about 100 hands with Att. to steal at 37 so he obviously understands position and 3-betting light is very possible with him.
What do you guys think of this, right villain to target? Is my bet sizing too small?
I was running at 20/17/7.5 at this table for what it's worth

PokerStars No-Limit Hold'em, $0.50 BB (6 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Button ($50)
SB ($36)
BB ($62.75)
Hero ($106.05)
MP ($29.20)
CO ($50)

Preflop: Hero is UTG with 8[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/heart.gif[/img].
<font color="#CC3333">Hero raises to $2</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">CO raises to $6.5</font>, <font color="#666666">3 folds</font>, <font color="#CC3333">Hero raises to $16</font>