Par 38 LED spotlights

Can you just plug the rapidled.com PAR38 20K 80 optics bulb into a dimmable desk lamp? The ones that you just touch the base and it dims a couple times then turns off, then back on again with your touch. Just curious.

Rapid LED strictly states that the PAR bulbs are not dimmable and should not be used in a dimmable fixture. I believe Ecoxotic makes a dimmable PAR bulb, but I am not sure if it is on the market as of yet.
 
What kind of fixtures have people been using without canopies? I'm planning on putting 2 of these over my 28g nanocube and am now in a quandry on how I'm going to mount them. I understand the bulbs are pretty heavy so I'm a little nervous to use a clamp with a gooseneck. Any suggestions?

Thanks!

Take a look through this thread; many of us are using track lighting suspended from the ceiling or light racks.
 
My tank is standard 40 gallon breeder. 36 inches long, 18 inches deep, 16 inches high. I will have a large amount of LR in the middle coming out of the water so I was thinking I could go with the Par 38 LED spotlights, my question is, can I get away with just two?
 
My tank is standard 40 gallon breeder. 36 inches long, 18 inches deep, 16 inches high. I will have a large amount of LR in the middle coming out of the water so I was thinking I could go with the Par 38 LED spotlights, my question is, can I get away with just two?

You may be able to get away with only two bulbs, but it all depends on the light requirements of what you plan to keep in the tank. If I were you I would start with two bulbs but make sure to plan ahead with whatever fixture you decide to use so that you may easily add more bulbs if needed. This is why a lot of us use track lighting so that you may add / remove and angle bulbs as needed in order to get the coverage you desire. One of the benefits of the PAR bulbs is the ability to spotlight areas of the tank you want to highlight.
 
You may be able to get away with only two bulbs, but it all depends on the light requirements of what you plan to keep in the tank. If I were you I would start with two bulbs but make sure to plan ahead with whatever fixture you decide to use so that you may easily add more bulbs if needed. This is why a lot of us use track lighting so that you may add / remove and angle bulbs as needed in order to get the coverage you desire. One of the benefits of the PAR bulbs is the ability to spotlight areas of the tank you want to highlight.

well I have two sockets from my chicken coop heat lamps, can I use those? And sounds good. start with two add more as needed I guess?
 
well I have two sockets from my chicken coop heat lamps, can I use those? And sounds good. start with two add more as needed I guess?

If they are clamp on fixtures I would avoid them due to the weight of the bulbs; they are quite a bit heavier then a typical PAR 38 lamp you would find in the store. Also, make sure there is no shroud around the bulb so that it may dissipate heat correctly as they tend to get fairly warm.
 
hey charley. I just got some par lights and 2 of them light only the ends of my tank so I need 3. If youre only putting stuff in the center of your tank then 2 might work. Other wise I've seen many people running 6-8 bulbs on 40 breeder's
 
So what are your thoughts about that bulb then? I'm going to put it over a 12 g nano and wasn't sure how it would work.

A few things.

First, they do not update or correct their website info. The site states that these bulbs are 6x15000K and 6xblue at the top, but under info it say 16000K white.
http://www.ledwholesalers.com/store/index.php?act=viewProd&productId=702

Second, they do not state what LEDs are used in the bulb.

Third, I bought some LED panels about a year ago to retrofit my tank. The panels were cheaply made with no name LEDs that were used. They were also no knowledgeable about their product or reef keeping IMO. They were promptly returned.
 

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Try to get some steel(stainless if possible) hose clamps to replace the zip ties. They do degrade over time. The heat from the fixture will also help stretch them and fail.
 
Here's how I mounted my PAR38 bulb

Here's how I mounted my PAR38 bulb

I have the 7 LED 20K 80 degree optic bulb.

I wanted to utilize the T5 fixture I have along with the bulb and here's how I did it. Please offer comments and suggestions.

I took a standard clamp-on reflector found at Home Depot or Lowe's with the light socket. I bought two of them to compensate for the weight of the PAR38 bulb.
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I removed the refector on one and screwed my new PAR38 bulb in.
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I zip tied a block of wood to the bracket I have holding up the T5 fixture so that I could clamp on the PAR38 with more stability.
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The I took apart the second clamp on socket with reflector. I removed everything but the clamp and clamped it to my refugium light to give the
PAR38 a completely stable mount. It's rock solid.
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FTS with only the blue actnics on along with the PAR38 bulb.
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I do not trust those clips, as the wing nuts tend to loosen from the slightest vibrations. I would find another way to mount the bulb.
 
What if I made the connections solid by putting a hose clamp around all the joints to keep it secure? A 2" hose clamp would easily fit around the main joint where the wing nuts are. I could take the wing nuts off and replace it with a hose clamp around the whole joint.

This would simply be to make it even more stable. Adding the second clamp to the fixture took away any extra weight of the bulb. It is very secure. And if it ever starts to give a little or bow in time, it will rest right on top of my T5 fixture until I get back to the office to see it. There's no way for the bulb to ever get into the water even if the joints fail and the bulb falls. It will just rest on the T5 fixture until I get there to correct it.
 
The hose clamps would be better. I would suggest finding a cheap wall mount or track lighting and you could house both bulbs and get rid of the other two fixtures.
 
The hose clamps would be better. I would suggest finding a cheap wall mount or track lighting and you could house both bulbs and get rid of the other two fixtures.

Well, this tank is in my office at work, so I can't mount track lighting and the ceiling of the office has no beams to hang anything from so this is pretty much my only option right now. I saw some cool fixtures at Lowe's and Home Depot that come out of the wall a little bit and if I hang the fixtures upside down on the wall it would work but the cheapest one I found was $40 or
$50. And I'm not spending any more money on the tank other than absolute necessities. The hose clamps I have already. It's an easy fix. And I am gonna mess with it some more on Monday when I get back to the office. I might be able to just use the one PAR38 bulb for the fuge as well. It's 80 degree optics and if I remember correctly, when I left the office yesterday it was casting some light over my fuge in addition to the tank bottom. We'll see. Point taken.....I need to secure the brackets and the clamps I'm using to make sure there is no room for failure. I'm on it.

Thank you for your help and suggestions.
 
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