Anyone try "LED Corn Bulbs"

[Knapp870]

Just saw a giveaway featuring these and was wondering if anyone had ran them on a reef or investigated par/spectrum in a Halide fixture?

 

[DarkSky]

6500k is going to be a very yellow light (natural day light), it'd probably grow coral well but algae too. If it really puts out 370w that'd be an interesting bulb to try.

 

[Knapp870]

6500k is going to be a very yellow light (natural day light), it'd probably grow coral well but algae too. If it really puts out 370w that'd be an interesting bulb to try.

My thought was you could use it for the heavy lifting and "cool" down the color with actinic led supplement bars

 

[SDK]

Might be interesting to try in a refugium

 

[minus9]

To me this design is a step in the right direction for LED's, especially combined with the right reflector. Imagine this design from Kessil's dense matrix with a halide style reflector, no more shading and insane shimmer.

 

[SDK]

I believe that you lose par with reflectors vs. pointing all of the diodes down. Reflectors are a solution to use wasted light in bulbs that are going to throw light in a 360 degree pattern.

 

[Jeight]

I have some these and the light is extremely yellow and while energy efficient in the fixtures I use them in it is not the spectrum of light I would use for anything reef related

 

[MattJS]

Very neat idea if they can move it to a cooler spectrum of light. Would be fun to try.

 

[minus9]

I believe that you lose par with reflectors vs. pointing all of the diodes down. Reflectors are a solution to use wasted light in bulbs that are going to throw light in a 360 degree pattern.

Agreed. But, I think a hybrid dense matrix / reflector combo would get us closer to solving some shading issues? Just a thought and maybe worth exploring?

 

[SDK]

Agreed. But, I think a hybrid dense matrix / reflector combo would get us closer to solving some shading issues? Just a thought and maybe worth exploring?

I think at that point they just make fixtures with multiple sets of diodes spaced out, but all still facing down. Your idea is definitely cool in theory though!!

 

[hart24601]

Agreed. But, I think a hybrid dense matrix / reflector combo would get us closer to solving some shading issues? Just a thought and maybe worth exploring?

It could, however metal halide still shade depending on the reflector size. Back in the day many put fluorescent with the halides to help with shading. With any light you can think of pretty much any tank area outside the reflector/cluster/panel as area that can potentially get shaded. Glass reflection helps near the edges too.

 

[minus9]

It could, however metal halide still shade depending on the reflector size. Back in the day many put fluorescent with the halides to help with shading. With any light you can think of pretty much any tank area outside the reflector/cluster/panel as area that can potentially get shaded. Glass reflection helps near the edges too.

Yeah, back then we were using VHO's with MH, which made for a very cramped canopy. Not to mention all that heat. :eek:

 

[jda]

You aren't going to get 370w of performance out of a 50w bulb. Remember from Tullio Del Auqila's MACNA presentation, there is no actual efficiency in any lighting type... only when measured with narrow-band tools.

Most good aquaium reflectors are 95%+ efficient... small price to pay for better spread and actually better than most plastic lenses.

That unit probably would not last long over a tank with humidity and salt creep... but I am just guessing.

 

[minus9]

You aren't going to get 370w of performance out of a 50w bulb. Remember from Tullio Del Auqila's MACNA presentation, there is no actual efficiency in any lighting type... only when measured with narrow-band tools.

Most good aquaium reflectors are 95%+ efficient... small price to pay for better spread and actually better than most plastic lenses.

That unit probably would not last long over a tank with humidity and salt creep... but I am just guessing.

I completely agree with you and this particular bulb mentioned here isn't suited for "our" purposes. But, I like the concept (well, you would only need half of the bulb that points towards the water) of this design and it will be interesting to see how, if at all, it progresses into something useful for aquariums?
I'm old school when it comes to reef keeping, but I like how things are slowly progressing with LED technology and other reef equipment.

 

[RobW]

Just saw a giveaway featuring these and was wondering if anyone had ran them on a reef or investigated par/spectrum in a Halide fixture?

Those are for high bay light fixtures for warehouse replacing metal halide for power consumption. You bypass the the ballast and wire directly to the screw shell. It is a retro for people who dont want to spend money on new light fixtures.

 

[RobW]

6500k is going to be a very yellow light (natural day light), it'd probably grow coral well but algae too. If it really puts out 370w that'd be an interesting bulb to try.

They do put out a lot of light but this is not an aquarium solution. I'm an electrical contractor. I have used these before. You dont want them on your aquarium.

 

[Knapp870]

Here is where they are appearing in reef fixtures. Be an interesting experiment to get par, etc. Just sucks they currently don't have anything cooler in terms of kelvin

 

[RobW]

The driver on these still get hot. Just no heat directed off the bulb. That's why it has that big aluminum heat sink at the base of the bulb. If they could make them in 12000k-20000k then ae would be on to something. These bulbs actually tend to be white to greenish in color in fixtures that I have used them in.

 

[RobW]

And for 40.00... you can absolutely bet your butt that they come from China and are not a UL approved bulb. And I guarantee the color wont match from bulb to bulb. A quality bulb of that style from a reputable brand are closer to 100.00 a piece

 

[RobW]

These are probably not dimmable as well.