It seems dying, maybe you can tell from leaves.
Temp between 18C - 25C

18 C when lights are off for 4 hrs, rest around 23-25C

All tomato plants shows same issues.





All rest of the palnts like OKRA, Pepper, bitter guard etc booming.

Its what happens when you mess with Mother Nature. Plants need more of the color spectrum to make chlorophyll. If I were you, I would turn off the colored lights and find some full spectrum lights. Also, tomatoes need 6 - 8 hours of darkness each night to complete the photosynthesis process.

Thanks for the tips Daisyl.



Please take a closer look at the leave, is this diseases?

Its hard to say. Turn off the colors and take a photo with natural light.

I grow tomatoes indoors with just a regular shop light and they do great.

Here is full color picture, click on it to see full size.

Any idea based on the color photos of the leaves?

I use fluorescent lights (4 per shelf) at around 5000K. That grows them well. Less light and they get leggy, more and they get a bit slightly burned on the leaves,

But when my current supply of 5000k bulbs wear out, I am going to LED tubes. They aren't much more expensive now, but apparently they last several years.

I would toss my fluorescents now, but I have them and they work great for a year. And after that, they work great as shop and kitchen lights.

But the LED tubes are probably the best deal in the future.