LED Fluorescent tube.
I really like this.
I asked the boss if he had any working sample and he led me to one operating for one of his tanks. Cool to the touch. Very bright white LEDs. A look in the waters couldn't tell me there was any significant difference in the light levels compared to PL ones. 12 watt consumption for 30 watts light output. 3 rows of LEDs on a strip running the entire length of the fluorescent tube. Electrical connections exactly the same as a regular fluorescent one. Colour temperature, 8,000K. If you already have existing fitting, you can do a little modification to fit this LED tube in.
What about the effects on plant growth ? I asked the boss and he says so far so good. The new LED lighting system had been on trial in his shop for two months since. I would love to convert to this.
A search on the net turned up quite a few sites on this.
One of them below.
http://www.spectrumlighting.com.au/index.php
