Karma - It looks like your cabinet has no back - that it's just sitting against the wall. You need to seal the light there too.

Don't neglect to change the water for your clone every day.

That second fan would be good to push air into your cabinet. But you aren't going to be able to block light with a filter. Use some 4" flex vent on both sides of that fan and paint the inside of the vent flat black if necessary to stop the light.

PC :thumbsup:

PC