interesting obserrvation about reflective surfaces...panda/mylar

So my light meter just arrived in the mail so naturally I dashed down to the grow room and started measuring the lux of everything in sight

using a ruler held in place I found that the light drops off MUCH quicker from the ends of the hood (the short sides) than the sides.

Also, when measured 18" from the long side of the light my lux readings were 150,000 higher on the side the grow area that is directly adjacent to a mylar sheet. So based on my understanding of the relationship between lux and lumens, that is roughly 13,940 more lumens produced by the mylar!!

So yeah, I just had to hang a sheet of panda up there and see the difference between the panda and mylar... Mylar resulted in 4,600more lumens over the panda film.

think its time to hang a sheet of mylar from the ceiling.

I just hung some mylar myself, I don't have a meter, but it does make a significant difference, what a bitch to hang by yourself though (closet).

Thanks. That's some great info.

I have been slacking the past few months with an exposed brick wall on one side of my room. This post is going to get me off my ass to hang some mylar.

I hung the mylar using foil tape (the kind for ducting). Its not that hard if you have a helper. hanging on brick though..that is going to be a bitch. I would try to mount a thin strip of wood like 1" x 1" to the brick using masonary screws and then just staple it to that.

Philo2 said:

Thanks. That's some great info.

I have been slacking the past few months with an exposed brick wall on one side of my room. This post is going to get me off my ass to hang some mylar.

Click to expand...

I use a Spray On Adhesive, sticks to anything