T4 Fluorescent brighter than T8


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Old 09-03-14, 07:20 AM
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T4 Fluorescent brighter than T8

I was in Home Depot and it seems like the smaller bulbs put out more lumens than the smaller ones. I'm going to be putting up some lights in my garage and had assumed that 8' T8s were the way to go. But if the small ones are brighter I wouldn't mind putting those up instead. Am I missing something?
 
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Old 09-03-14, 08:13 AM
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A few years ago I sorted through the 4' T8's to get the one that would work best in a shop, for me brighter was better. Where T8 was my choice I then had to select the color and when I put them side by side the soft white bulbs looked defective. I think I ended up with 5,000K or a little brighter as the 3,000 range just wasn't enough. We had 16' ceilings so maybe that affected our choice.

In the stores they had a mix of bulbs displayed, but the difference was the color intensity so be sure when selecting one over the other that it isn't just two different color temperatures.

T6 were just coming out back then and the complaint about them was their high intensity. Large buildings were putting them way up high, but when too low people had trouble looking at them. Not familiar with T4's.

As for 8' vs 4', check the price of lamps. LEDs are coming out but last I looked they are way too expensive.

Bud
 
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Old 09-03-14, 09:43 AM
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Availability of bulbs to fit your fixture should also be considered. Wikipedia:
Slim lamps. Power ratings and lengths not standardized (and not the same) between different manufacturers
Source: http://en.wikipedia.org/wiki/Fluorescent-lamp_formats
And of course it follows the harder it is to find something the more it costs.
 
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Old 09-03-14, 02:42 PM
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I have not heard of T6 or T4 lamps. Only T12, which are being phased out. T8, which are widely available, and T5's which seem to really never caught on.

I would recommend going with a T8 800 series lamp. This will be an 841, 850, etc. 700 series T8 lamps are also being phased out.
 
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Old 09-03-14, 02:57 PM
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I'm with Bud....it's all about the color temp. I've had bulbs that were rated the same output in lumens, but to me, I needed that "daylight bulb" at 5500k to be able to see well.

Look at price and availability...
 
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Old 09-03-14, 04:57 PM
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For home use I would stay with a T-8 fixture.

We did a whole warehouse with 90 six tube T-5 HO lamps replacing 400w metal halide high bay fixtures. Needless to say it was stunningly bright. The fixtures were chain mounted off the steel deck. The reflectors are polished chrome. At 277v and under 1A a fixture they are a good choice for a warehouse. Too garish and bright for a home shop.

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Old 09-03-14, 06:10 PM
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For a shop, a 4100K or 5000K is a good choice IMO.
 
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Old 09-04-14, 12:02 AM
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Although it's not recommended..... you can use two different tubes in the same fixture or two and two in a four tube fixture.
You could use 1-2 low and 1-2 high temp.

I use a mix of cool white and daylight tubes in my shop.
 
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Old 09-04-14, 05:04 AM
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Doesn't that look a little funny with the mismatched colors?
 
 

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