Raising light pf is ok, as long as you have a plan of action. You really need to be comfortable at the table and know your opponents preflop calling ranges and postflop tendencies. A lot of 1/2 players are way too predictable. We raise preflop to really balance out our range against the thinking players. Any smuhck can initiate a raise with ATC. It takes a key professional to figure out when to 3bet without a big hand. 3betting light will gain you the most money in LSNL because of 3 reasons.
1.It gives us the opportunity to pick up money that we believe is dead without even seeing a flop.
2.Even if we do get called, it drastically narrows our opponents ranges down so its easier to play against them postflop because like i said earlier, 1/2 players are too predictable.
3.
It helps our image and will give us action on our big hands later!
Heres an example how raising light and 3betting light will get you paid from a hand I played last night:
1/2 NL Holdem
Hero has been very active, raising a lot of pots and being very aggressive postflop. Has 3bet Villain a couple times in the past 2 hours with 89ss and A10o. Important to note that Villain is a very scared player, usually has decent holdings but will not commit to a 3bet without a big pair or AK. Also, I did not 3 bet this hand, but the point is to show how previous aggression can pay off on hands that wouldnt usually make that much.
the hand:
Folds around to Villain (150bb) on button who limps, SB folds, Hero looks down at A

A

in BB and makes it $16 to go, Villain calls. (He is never calling this bet against anyone else, he usually limp/folds to aggression.)
Flop

$31) J

4

6

(Perfect bs flop to cbet as ive been doing with all my hands)
Hero bets $22, Villain calls.
Turn

$75) K
Hero bets $48, Villain calls.
River

$171) 4
Hero bets $102, Villain takes very little time in calling. Hero shows hand and wins other player at the table requests to see both hands, Villain shows J

9

.
Point is, if I didnt balance my range and wasnt aggressive in the past, I only make 4$ on this hand instead of getting 3 streets of value especially from this type of opponent. BE MORE AGGRE$$$$$$$$$IVE PEOPLE!!!!!
Edit: ROFL at the

faces forgot to space : and (