Is mylar really worth it?

What sort of benefit and I going to see using mylar over just leaving the walls bare?

mylar has 95 to 97% reflectivity

The benefit is more light is used to the plants advantage instead of absorbed into the walls, the light just keeps bouncing off the mylar and onto the plant, people say don't use aluminum foil as it creates hot spots but i just take a credit card or something and make it very smooth against the walls, so far no negative effects.

yea its good i keep a fat roll of it.
and it makes the room look a lil better too.

it will free up a lot of wasted light, and everyones bottleneck almost always going to be electricity aka how much power you consume, the efficiency the mylar provides is priceless

Hey extrusion do u need anthyn to stick the alfoil to the wall or will it work by just applying it with a dull straitght surface like u have said? i really like the sound of that idea

mylar does work well. It does were out thou. The shiny comes off after being blasted by uv for awhile. I like to use a plastic that has flat white on one side and black on the other. Its 90% efficent but will never were out. just my 2 cents

Extrusion said:

The benefit is more light is used to the plants advantage instead of absorbed into the walls, the light just keeps bouncing off the mylar and onto the plant, people say don't use aluminum foil as it creates hot spots but i just take a credit card or something and make it very smooth against the walls, so far no negative effects.

Click to expand...

only use mylar or paint it white

the reason people do not us alu foil is because its not very reflective, sure i read somewhere it was only abot 30-40% this onfo could be wrong though

light tight...its also IR reflective. only one that is. its black white with infused layers of foil.

It helps reflect lumens that would have otherwise been wasted. There are several variations of reflective film available.I use the 2 mil thick mylar. I only use it on the lower portion of the walls as light does not reach the upper parts of the wall. It generally comes in 54" widths which is about perfect height for max wall reflectivity.
What size is your space & what sort of light reflector are you using?

JimmyTheJaw said:

the reason people do not us alu foil is because its not very reflective, sure i read somewhere it was only abot 30-40% this onfo could be wrong though

Click to expand...

It certainly is wrong. Where does this rubbish come from??

Aluminium foil is 98% efficient as a reflector of heat and light.

This is why aluminium is used as the coating on astronomical and other mirrors.

This is why aluminium is used to coat emergency blankets. There is hardly a better reflector than aluminium.

Fenda said:

Hey extrusion do u need anthyn to stick the alfoil to the wall or will it work by just applying it with a dull straitght surface like u have said? i really like the sound of that idea

Click to expand...

Hey wassup,
Try some packing tape, the clear variety naturally. Strong & cheap. It is what I use for my mylar installation.
Also remember that the dull side of aluminum foil is the heat absorbtion side and the shiny side is the heat reflective side. Most people are not aware of this.

I just thought I would say, I had a can of flat white let over and used it, never looked back, honestly I have considered MYLAR. Thanks for the opinions.

Spanishfly said:

It certainly is wrong. Where does this rubbish come from??

Aluminium foil is 98% efficient as a reflector of heat and light.

This is why aluminium is used as the coating on astronomical and other mirrors.

This is why aluminium is used to coat emergency blankets. There is hardly a better reflector than aluminium.

Click to expand...

thats why we should not beleive everything we read lol


just done a quick search on this topic and found this post from pot roast

Here's the chart of percentages of light reflected from Jorge's latest:

Foylon 94-95
Reflective Mylar 90-95
Flat white paint 85-93
Semi-gloss white 75-80
Flat yellow 70-80
Aluminum Foil 70-75
Black < 10

Spanishfly said:

It certainly is wrong. Where does this rubbish come from??

Aluminium foil is 98% efficient as a reflector of heat and light.

This is why aluminium is used as the coating on astronomical and other mirrors.

This is why aluminium is used to coat emergency blankets. There is hardly a better reflector than aluminium.

Click to expand...

Wow not really dude. You can just look at mylar and know it's more reflective than aluminum foil. Just rediculous.
Spend the $20 for mylar it's worth it.

JimmyTheJaw said:

thats why we should not beleive everything we read lol


just done a quick search on this topic and found this post from pot roast

Here's the chart of percentages of light reflected from Jorge's latest:

Foylon 94-95
Reflective Mylar 90-95
Flat white paint 85-93
Semi-gloss white 75-80
Flat yellow 70-80
Aluminum Foil 70-75
Black < 10

Click to expand...

Nice post. Surprised to see flat is more reflective than semi-gloss.