While reflective sheets can prove burdensome to mount flush to walls, they do offer the highest reflectivity of any material, and as an added and unexpected benefit, they give you trippy visuals, much like a carnival trick mirror. (I confess to many evenings seeing cosmic meaning in the patterns of reflections that shimmered in my Mylar as it shifted in the fan breeze — after inhaling a pure sativa, of course.)
Panda Film reflects 75–89 percent of the light that hits it and is much more rugged than even the thickest Mylar. It’s easy to clean and hang, and is cost-effective and versatile in ways many growers don’t yet even know about.
And white-paint reflectivity ratio isn’t as high as with Mylar or Panda Film.
The most popular reflectivity material is white poly plastic, popularized under the brand Panda Film. I use the thickest version of this plastic sheeting I can find. It has a highly reflective white coating on one side, and black coating on the other.
The wall reflectivity of your cannabis grow room has a massive impact on how much light reaches your plants’ leaves, and how much light is wasted. Light emanates downward and outward from LED grow lights and HID reflectors. Approximately 20–40 percent of it hits grow-room walls. You want as much of that light as possible to bounce back from the walls and onto your plants.
Dimpled German Aluminum
The distance from the top of your cannabis plants to the bottom of your grow lights is one of the most crucial factors to control in your indoor marijuana garden.…
Thieves use thermal detection drones and handheld devices to gather the same kind of data, which they then use to identify grow ops they can later rob.
Another great thing about orca film is that it has also some anti-mold properties and the company states that it can reflect up to 95% of the visible light spectrum!
C3 anti-detection film is another variant of Mylar and it is a material that has been specially designed not to let any heat trough. Because of that it can be a great addition to grow rooms that are constructed in cold climates. But you have to be careful in hot climates where you will need a lot more ventilation to counteract that heat as well as those light reflection properties.
Aluminum foil that we also know as thin foil is a common household item that we use for cooking and other stuff. Despite that this material looks very shiny it does reflect only about 60% of the light that comes in contact with the dull side and the shiny side is even less reflective.
When you are growing cannabis indoors you are creating a self-enclosed environment by providing ventilation, lights as well as soil, and nutrients that promote plant growth. Usually grow lights are the single most expensive thing any grow room needs. That is because the light is cannabis plants’ main energy source and without proper light, there will be no growth and no bud production.
Elastomeric paint is another great substitute for simple flat paint. It has a latex additive that makes it a semi-liquid and will allow paint coating to seep into all cracks and even heal itself under pressure and some other mild damages. This paint can also reflect a great deal of light but it will be a bit more expensive and you will need to wait a longer time for it to dry.
The only drawback is price because this material is very expensive and for the beginner grower that is on a budget it can be too expensive!
If you are intrigued then you are not alone because many growers when first starting out find information about grow room reflectivity and are pleasantly surprised when installing a reflective film or painting you grow room white can increase the overall growth and yield of your plants growing in that room.
Black and white Polymer
This option can be great for large-scale sealed grow operations but for small-scale cabinet grows it usually is an overkill and it is too hard to properly attach this polymer to all the walls without cutting it in multiple places.
Regular mylar sheets are usually very fragile and any damage to them can result in bends and folds that tend to concentrate light in one spot and if that happens near your plant then it can get heat damage.