I've been there. Don't let the naysayers stop you from experimenting.
The big thing is don't use foil and space blankets. It looks cool. But your basically making a little oven there and plants like it cooler then we do.
Think more about temperature and airflow now instead of light reflection. If you can't get mylar, then just leave the walls as is. Make it light proof some other way.
You have a fan in there which is good. But you will want something moving air from in to out. That's going to be the trick to getting this to work unless you are going to manually open and close it every day for when the lights are on.
Even a fluorescent will warm up a little unventilated space.
Then if all goes well, verticle space will be the next issue. Even flowering from seed I would expect plants to stretch to touch the light unless you train them somehow.
I've been there. Don't let the naysayers stop you from experimenting.
The big thing is don't use foil and space blankets. It looks cool. But your basically making a little oven there and plants like it cooler then we do.
Think more about temperature and airflow now instead of light reflection. If you can't get mylar, then just leave the walls as is. Make it light proof some other way.
You have a fan in there which is good. But you will want something moving air from in to out. That's going to be the trick to getting this to work unless you are going to manually open and close it every day for when the lights are on.
Even a fluorescent will warm up a little unventilated space.
Then if all goes well, verticle space will be the next issue. Even flowering from seed I would expect plants to stretch to touch the light unless you train them somehow.
Very common mistake. Im sure many of us have toasted a seedling or two.
Obviously your light is not enough to make real buds. But adding reflection makes a minimal difference over normal wall paint and usually insulates too much unless it's designed for growing.
What ever you can invest, spend it on more light and more airflow and more height.