I have kyoto grass plants, amazon sword plants, and peacock fern plants. I use Flourish seachem treatment and Flourite substrate for them, but the light fixtures in my tank hood are broken… will these plants be ok with ambient light in my room if i leave the shades open?

Well, I may be a bit late to ask this since I already ran the wiring and installed all the lights, but anyway, here’s the dilemma.
I am installing a light fixture on top of each post on my deck railing. There are a total of ten posts, hence ten lights. Each fixture has three 12v light bulbs. Each light bulb is 18watt, push-turn (bayonette base, like car tail light bulbs), so each fixture is 54 watts. I ran 14 gauge solid romex (2 conductor plus ground), from the transformer and daisy-chained to each fixture. In other words, all fixtures are wired in series. I was carefull to observe the polarity at all fixtures.

Since total wattage is 540watts, I installed a 600 watt 110v-to-12v transformer to an outside GFCI outlet and connected the wire from the fixtures to the terminals on the transformer.

When I flipped the switch to energize the GFCI, all the lights worked but the bulbs are of different brightness: the fixture that is first in the series, or closest to the transformer was very bright, but the brightness of each subsequent fixture is stepped down, and in the last fixture the filament in the bulbs barely glows. Reversing the polarity at the transformer makes no difference.

Any thoughts???
In reply to a comment by Les. When I said "fixtures are wired in series", I meant daisy-chain, as in the way several outlet receptacles are wired together in one room. Is that what you call wired in parallel? if so, my mistake.
And yes, when I remove the first fixture (or any other), all the others still light up and I get the same step down in brightness, where the first one is the brightest light then they get dimmer and dimmer down the line.
My original thought for this dimming feature was because the solid wire could make it harder for the transformer to push the low voltage throughout the entire length of the wire (about 60ft.). Is this a correct assumption? Or does stranded or solid make any difference?

Also, I used romex because I had several rolls left over from building the house and I pushed it through pvc pipe and it’s all under the deck, nothing exposed, so no worries there.
Another idea I had was to remove the transformer and just push 110v through the wires by using a dimmer switch and push very little current to see what happens.
Will the 12v bulbs blow out if I set the dimmer at the lowest setting? I have read that bulbs don’t care if the current that is ran is either AC or DC.

I have a 40×50 ft. shop with 16 ft. high celings. We are putting the t8 8 ft fluorescent light fixtures up. And i dont know how many to put in.