light intensity

Hi Folks....help me out here with an experiment...I need DATA !
Anyone with old camera equipment (or new) light meters? Go outside and take a light reading in the sun/haze or unobscured area......then go inside your plastic hoophouse/hut where your pumpkin plant is.
Whats the intensity unobscured?
 Whats the intensity in the hut under plastic?
Whats the mil thickness of the plastic?

Thanks...we will all learn from this........post the info here on the list or send it to me private.....Im curious !...thanks..G
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