T5 question
 

I have 2 shelves with 29cm depth and 75 length,high of 60cm and 88cm. I grow palnopsis and oncidiums. I bought today 2 t5 bulbs 58cm more or less for plant spectrum . They say no more then 8 bulb per shelf. How many bulbs should I put, and how far up from the plant. https://uploads.tapatalk-cdn.com/201...7525480912.jpg

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I've had good luck growing under lights with 2 T5s set just above the plants. There's a good discussion on lighting in the forums section.

You need to pay attention to how many lamps you put on one circuit. If you have too many, the circuit breaker will trip.

They are 24W bulbs, so you can probably estimate using the info I graphed here.