PAR METER (PPFD): Lightray Diffuser & Cosine Corrector

You need to pay money to use full spectrum and 4 other options

Bought mine a couple years ago and just got it back out after not using it for awhile. Just realized I was using it wrong the whole time! Call it my fault for not reading every word , I bought this after watching a video about how amazing it is. I was under the impression that I buy this and it’s all I will need. Well that’s wrong ! $6.95 for full spectrum, $6.95 for full spectrum + far red , $6.95 blue light , etc. 5 or 6 different ones @ $6.95 each that’s supposed to be for life ! There was nothing on the box or in the box that mentions having to buy more to use it , I did just read the something I had to click on and all the way at the bottom ( way past what I and probably most would have read too) says you need to buy more. Without a $400-$600 real PAR meter how do we know if it’s giving a proper reading , or even close cause that’s all I would except for something like this.

Par for your phone

Great product and app to use with. Thanks bas for recommending this product.

My meter works great thanks to the guys at build A soil