Time to work on the canopy again.....first step was to paint/stain the main trim.
Wile i did that i sprayed the inside of the canopy all black too with a very heavy coat of water based urethane on top of it to help with the humidity not getting into the wood. As you may have noticed in prier pics...all the screws were covered with liquid nail also to help with the same thing.
Now i know i can lift this whole thing but i wanted to be able to keep it up wile im working in the tank. I was thinking of a pulley system to help with that but that was getting to complex. We all know that sometimes simple is better so i skipped that whole idea except one part. The one part was the scissor part of the lift.
I grabbed more stuff at work from the scrap pile. This time it is a fiberglass circuit board type material but much stronger!!! Its called Polycluth. Trust me...it burns up solid carbide end mills quick! I made it into .75" wide strips to be about 10" long each. Tossed them on the cnc so that the holes where in the same spot on each. In the pics below you will see that i used nylon screws to hold them together but i did change them to stainless for even more strength. the screws are not going thru just the wood but a nylon bushing that i pressed into the wood so i could get long time wear from lifting. There is a pair of these scissors on each side of the center brace on the top part of the canopy. They go down to another piece of wood that i have coming from the back and rests on the center brace of the tank.
As you can see i had to put a stop block in so that there is not magga forces on the pivot points by going to far with it. The straighter the scissor is the better when its locked into place
step back and snap a pick for proof that im not holding it up.
Now in this next pic you will see the scissor on the right a little but now im showing off the LEDs that im using for this build
The LEDs of my choice to use on this 75 are called Madness ZERO. They have 20 blue and 20 white Cree xpe leds with 60 degree optics on them using a TOTAL of 100 watts. There is no fans on these at all. Zero noise! But they are heavy cuz of the big heat sink. They get only warm to the touch. Reason for that is because the driver ...which are dimmable!!...is located not on the led unit it self, but before them.
I havent taken par readings yet but ill tell you one thing...i bet they are close to 250watt halide readings...these suckers are bright in 18" of water only 4" above.
more pics of the ZEROs