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Search: Keyword(s): ; Posts Made By: evilc66
Forum: Lighting 11-23-2011, 06:55 PM
Replies: 62
Views: 5,835
Posted By evilc66
This is interesting. I don't remember my 4x24W...

This is interesting. I don't remember my 4x24W fixture being that low. Looks like I may have to pull it out and test it tonight.
Forum: Lighting 11-01-2011, 04:43 PM
Replies: 7
Views: 976
Posted By evilc66
Almost anywhere will work. Ebay has tons of cheap...

Almost anywhere will work. Ebay has tons of cheap 6500K lamps. Just watch for the lens angle. Most wont have wide angle lenses (wider than 35-40 degrees), unless you ask.
Forum: DIY 10-28-2011, 08:19 PM
Replies: 55
Views: 7,440
Posted By evilc66
Red covered most of the issues pretty well. I...

Red covered most of the issues pretty well. I want to throw in some additional information though.



Careful. You didn't read the fine print in what I wrote. And yes, it does apply to DC...
Forum: DIY 10-28-2011, 02:00 PM
Replies: 26
Views: 6,117
Posted By evilc66
In it's most basic sense, it is a PWM driver, but...

In it's most basic sense, it is a PWM driver, but it really is a lot more than that. The LM3409HV is an external FET LED driver. Functions just the same as an internal FET driver, like an LM3404...
Forum: DIY 10-28-2011, 01:54 PM
Replies: 55
Views: 7,440
Posted By evilc66
The reason we run in series is that it's safer....

The reason we run in series is that it's safer. Sure, it creates a few more headaches when it comes to tracking down the faulty LED, but it's better than the alternative.

When run in parallel,...
Forum: DIY 10-27-2011, 08:59 PM
Replies: 55
Views: 7,440
Posted By evilc66
"Red" as a color ranges from about 615-700nm. The...

"Red" as a color ranges from about 615-700nm. The closer you are to 615nm, the more orangey the color looks. The closer you get to 700nm (beyond that is near infrared), the deeper the red. 660nm reds...
Forum: DIY 10-27-2011, 02:49 PM
Replies: 19
Views: 872
Posted By evilc66
Multi die LEDs aren't that different from single...

Multi die LEDs aren't that different from single die ones, but driving them correctly with a constant current driver is more important. It's especially important with these cheap Chinese LEDs that...
Forum: DIY 10-25-2011, 03:12 PM
Replies: 19
Views: 872
Posted By evilc66
Like Hoppy said, it's not that simple. What you...

Like Hoppy said, it's not that simple. What you are not factoring in is voltage drift due to die heating, voltage differences due to binning, etc... It's not nearly as simple as just saying that an...
Forum: DIY 10-24-2011, 02:15 PM
Replies: 19
Views: 872
Posted By evilc66
No. The important thing to know is the current...

No. The important thing to know is the current you want to drive the LEDs at. You don't drive LEDs by voltage. The reason being is that small changes in voltage leads to large changes in current,...
Forum: Lighting 10-11-2011, 02:13 PM
Replies: 21
Views: 2,278
Posted By evilc66
No, they are just crap HO ballasts. They run at...

No, they are just crap HO ballasts. They run at higher wattages than NO, but will be pretty badly beat up on by a good HO ballast.



They did it because they are cheap. In each ballast box,...
Forum: Lighting 10-04-2011, 07:03 PM
Replies: 10
Views: 480
Posted By evilc66
Increasing the wattage is possible (it's called...

Increasing the wattage is possible (it's called overdriving), but as mentioned before, will drastically reduce the life of the bulbs if not cooled correctly. You could do a complete T5HO refit, but...
Forum: Lighting 09-29-2011, 01:39 PM
Replies: 21
Views: 1,814
Posted By evilc66
It's a little more technical than being a...

It's a little more technical than being a "scatter chamber", but that's the basic principle. They way the light bounces around inside the lens is a little more deliberate than you make it out to be...
Forum: Lighting 09-28-2011, 06:58 PM
Replies: 21
Views: 1,814
Posted By evilc66
The optics you have, and that most of use, are...

The optics you have, and that most of use, are called TIR lenses, or Total Internal Reflection. Basically what that means is that the exterior profile of the lens body acts as a reflector would. When...
Forum: Lighting 09-28-2011, 06:39 PM
Replies: 41
Views: 4,718
Posted By evilc66
Provided the bulbs aren't too hot (you need to...

Provided the bulbs aren't too hot (you need to check the ends, not the middle, as that's where the electrode is, and the part you need to keep cool), then keep on rocking.

Now, it is possible...
Forum: Lighting 09-26-2011, 12:25 PM
Replies: 41
Views: 4,718
Posted By evilc66
I don't know if I would recommend the WH7 unless...

I don't know if I would recommend the WH7 unless you are actively cooling the bulbs. Again, the WH7 overdrives the bulbs by about 30%, and as a result, will shorten the life of the bulb. How short of...
Forum: Lighting 09-24-2011, 12:50 AM
Replies: 41
Views: 4,718
Posted By evilc66
Sure. Even changing them out to something like a...

Sure. Even changing them out to something like a Workhorse3 would be a vast improvement. Pretty much any Fulham T5HO compatible ballast would work great, except the Workhorse7, which overdrives the...
Forum: Lighting 09-23-2011, 09:11 PM
Replies: 41
Views: 4,718
Posted By evilc66
Glad you guys found my review interesting, if not...

Glad you guys found my review interesting, if not useful.

Just to clear up a few points of confusion, these fixtures use electronic ballasts, albeit crappy ones. It seemed to me that someone was...
Forum: DIY 06-13-2011, 04:41 PM
Replies: 28
Views: 5,256
Posted By evilc66
They do, but poorly. You get about the same...

They do, but poorly. You get about the same results as trying to drive a "P" model with an analog voltage. It's not worth doing. The results are much more consistant when you drive the input with the...
Forum: DIY 06-13-2011, 02:48 PM
Replies: 4
Views: 404
Posted By evilc66
The system would have to almost directly copy the...

The system would have to almost directly copy the Vortech for it to be practical, as the efficiency of inductive power transfer falls through the floor the farther away you get from the power source....
Forum: Lighting 06-12-2011, 08:07 PM
Replies: 8
Views: 637
Posted By evilc66
Yup :) Not these ones. The TrueLumen...

Yup :)



Not these ones. The TrueLumen strips use a built in current regulator (not a resistor), requiring the use of a DC fixed voltage power supply.
Forum: Lighting 06-07-2011, 07:14 PM
Replies: 5
Views: 458
Posted By evilc66
Can the Profilux II do 0-10v control? I know the...

Can the Profilux II do 0-10v control? I know the Profilux III can.

On the 30" fixture, you will need to use ballasts designed for 39W bulbs, as Coralife decided to use a bastard size bulb in that...
Forum: Lighting 06-07-2011, 07:01 PM
Replies: 8
Views: 2,079
Posted By evilc66
That's cool if that's what you want to do, but...

That's cool if that's what you want to do, but the color temp on ours is still not very suitable IMO. If you want to mount them that high, then you are going to need 18W+ lamps, with 40 degree lenses...
Forum: Lighting 06-07-2011, 03:22 PM
Replies: 5
Views: 458
Posted By evilc66
There are other options other than DALI control,...

There are other options other than DALI control, like 0-10v which is a lot cheaper to implement, and also makes it compatible with some controllers. I'm not sure if any controllers support DALI right...
Forum: Lighting 06-07-2011, 02:54 PM
Replies: 8
Views: 2,079
Posted By evilc66
Link? Be careful with some of the Chinese...

Link?

Be careful with some of the Chinese retailers of lamps like this. The current that the LEDs are run at is rarely what they are advertized at. They like to use the LED ratings rather than...
Forum: Lighting 06-07-2011, 02:49 PM
Replies: 5
Views: 458
Posted By evilc66
Dimmable T5HO ballasts are not that common, and...

Dimmable T5HO ballasts are not that common, and certainly not cheap. What size fixture do you have?
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