How to get more lighting in a 20gal.

[pmoyniha]

Hello,
I have a 20 gal aquarium with the standard canopy that came with it (made by Hagen). The light fixture itself is 22.5" long and has an 18" 15W bulb in it. From what I understand I need to have at least 40W for my aquarium (I have plants that I owuld like to see grow). How can I improve the lighting. I haven't seen bulbs with higher wattage. Is there a do it yourself way to add in another tube (which still only brings me to 30W)? I thought about buying a seperate fixture from Canadian Tire and rigging it into the spare space in the roof...

If you have any ideas please let me know.

Thanks

 

[freshmike]

Many of the larger aquarium shops will sell reflectors that you can add onto your existing fixture that claim to increase brightness by 100%
Hope this helps!

 

[pmoyniha]

I tried backing the bulb with tinfoil, although i dont see a huge difference. The trouble is that I don't have a car and there are no large shops around. What do the reflectors look like? Is it something I could make myself?