150w in 45cmx45cmx125cm cabinet - Cooling question

So in light of my recent post on my cool tube arriving this morning, smashed in the box, I am questioning whether I can do without the aircooled reflector in my small cabinet, and maybe go with a more standard reflector.

Set up is:

45x45x125 wooden cabinet, sealed
125mm inline fan with 100mm filter
2 x 100mm passive intakes
1-2 plants in dwc bubblers

Plants are being scrogged (Amnesia Lemon), but really need to be able to get the lamp near to the plants without burning or bleaching, in order to use the lumens to their fullest effect.

Can I get some thoughts and comments on this? Picture of grow cabinet in Google sketch is below to see the general setup. It look pretty identical to this.

Google sketch up is amazing by the way. For all you grow planners, you could do a lot worse than get it downloaded; it's so simple.

Looking forward to hearing any thoughts or ideas on the above!

Best regards,

Blue

Take a look at my journal. I was running a 150W and literally had that thing 5 or 6 inches off the top of the plant. Just exaust the heat right off of the bulb and have another fan moving the air and you should be fine. They don't get too hot.