Quote:
Originally Posted by JimO
I haven't found a direct comparison yet between a standard T5 and a T5HO bulb, but the 36-inch T5HO bulb is a 39-watt bulb that puts out 3,220 lumens. Standard 27-watt compact fluourescent bulbs (that substitute for a 100 watt incandescent bulb) puts out 1,750 lumens, so the difference isn't 3x as I indicated before. I have to run, but now I'm curious and want to find a direct comparison of a standard T5 to an HO T5.
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You can look at the bulbs listed on these two pages and compare them...
1000Bulbs.com | F21/T5/865 - 21 Watt - 6500 Kelvin - T5 High Efficiency Fluorescent
Vs.
1000Bulbs.com | F39/T5/HO/865 - 6500 Kelvin - T5 High Output Programmed Start
It basically looks like with HO you are looking at 1.5 to over 2x the lumen output. You should be able to get a fairly accurate average lumen per watt number by dividing total mean lumens by the number of watts in the bulb...I would divide by mean Lumen since that is the average output of the light and not its peak output when brand new.
I don't know what Plusrite brand is doing, but their bulbs especially in the HO line look to put out way more lumen then the GE...the only thing that concerns me is they look almost a half inch shorter, so it makes me wonder if they aren't including the pins in their measurement or something. But my guess is the bulbs still fit most standard sized fixtures...seems pretty silly to make a "standard size" bulb that doesn't. 1500+ extra mean lumens for the same size/wattage as the HO GE bulb...thats nuts, they either make kick ass bulbs or are fudging the numbers some how.
