T5 Light problems

[nhman]

Anyone have any experience and or suggestions for the following issue with T5 bulbs not turning on in the AM that I am recently experiencing:

The setup:
- Basement setup, no windows. Constructed with concrete board and sealed for house protection from humidity.
- T5 HO bulbs in a 4 foot, 8 bulb New Wave fixture.
- I have 6 banks of these fixtures hung above the growing benches at variable heights, per orchid height and leaf top foot-candle measurements by a good light meter. All are on timers, total "day" varies thru the year.
- There are several fans for circulation: Two 8 inch greenhouse fans are above the lights, there are also two fans that rotate to circulate air at the plant level.
- Humidity is controlled by a Humidistat and Hydrofogger using RO water: Humidity kept at 50% during the day, rises to 70% at evening with the lights and air conditioner off.
- The heat generated by the lights are moderated by an air conditioner set to keep go on at 72 degrees and keeps the temperature in the 65 (nights) to 80 degree (days) range.

Problem:

I have had numerous banks of lights that are NOT turning on in the AM. If I restart them or rotate the bulbs, they go on. I have tried new bulbs - no change.
The only thing that seems to have helped is to let the humidity decrease to about 40%, so I'm wondering if this bulb thing is humidity related?

Any ideas or suggestions are welcomed!

I am getting to the point of looking at the newer LED systems or at water cooled system if I can't solve this issue as this is rather labor intensive in the AM and I can't assure lights when I'm not at home on vacation.

Thanks in advance for any ideas, suggestions, direction,etc, etc, etc.