Sick plant help

[VERN-O]

I'm a newbie for sure, but there is something going on in my terrarium. The leaves are going yellow and or brown.
Any help greatly appreaciated
Humidity around 80%
temp 70F
LED light on a timer 12hrs
Hand Mist daily
Door cracked open for ventilation(6 hours a day)

[greenpassion]

Welcome Verno. I don't (as yet) grow in terrariums, but I can see what you mean. Someone with knowledge about this will chime in for sure. Good Luck

[Orchid Whisperer]

What kind of are you using (tap, distilled, rainwater, etc.)?

I was thinking mineral deposits from the water. Or, possibly the light is too strong.

[VERN-O]

Originally Posted by Orchid Whisperer

What kind of are you using (tap, distilled, rainwater, etc.)?

I was thinking mineral deposits from the water. Or, possibly the light is too strong.

Water is 18 mega ohm reverse osmosis pH is a little low at 5.3

Had a T8 tube light and recently replaced it with LED on Jan1.....dumb question can LEDs be too bright for plants?
Fairly new set up link to pics here
My desktop 12x12x16

[Orchid Whisperer]

Originally Posted by VERN-O

Water is 18 mega ohm reverse osmosis pH is a little low at 5.3

Had a T8 tube light and recently replaced it with LED on Jan1.....dumb question can LEDs be too bright for plants?
Fairly new set up link to pics here
My desktop 12x12x16

The water should be pure enough.

I don't use LEDs but I suspect it is possible for LED light to be too high. Maybe someone that uses LEDs can offer advice?

[Ray]

Yes, any light source can be too bright. What are its specifications, and how far from the plants is the fixture?

[VERN-O]

Ray,
Here are the specs
Specifications:
Color of the Light: Multiple color （16 kind of color,as the remote controller shows)
Voltage: 100-240v 0.3A 50/60hz
LED Quantity: 36 LEDs
Housing material: Aluminium
Cable Length: 1.5M
Output: DC20V 0.5A
Power: 6W

All the plants affected are on the floor of the terrarium and the light is 14” from the plants affected. I had been using just the white setting but have been using the the red and blue blend, there is a dimmer on it as well

[Leafmite]

My cheap LED light burned a few leaves of my Bulbos and the Dracula. I had not thought it was that strong of a light. I guess I should have started it further away and gradually moved it closer. The lights are now further away and the orchids have since recovered.

[estación seca]

The Pilea leaf is definitely light burned.

[Optimist]

I was thinking "sunburn"

An option is to raise air movement. Do you have a small fan, like a computer fan in there? Air movement often allows a more intense light. Getting all the factors right is crazy-making.