Confused by Sylvania fluorescent...
Sorry if this is long...
I searched the sylvania web site to find information about their fluorescent bulbs. I'm trying to decide which one will be best. I plan on using 2 48" bulbs, a mix of cool and warm, to help some tropical plants. I'm only looking at Sylvania (it's confusing enough that I don't dare add in other companies...).
I want to decide which, of T8 and T12, is best; which K ; and which of their brand name. I've already come to the conclusion that higher wattage gives out higher lumen and higher CRI also gives out higher lumen, am I right?
First of all, I was surprised to find out their Gro-Lux are the ones giving out the less lumens! (T12, 48", 40W, CRI 89, 3400K, gives only 1875 initial lumen).
Most of their bulbs come in 3000K, 3500K, 4100K. Of the 3 Ks available, which would gives a good mix of cool and warm? I thought I should be looking for one close to 3000K and one close to 6500K.
They have a brand called the Octron Supersaver Eco family, only in T8 (T8, 48", 30W, CRI 82, 3000K or 3500K or 4100K, 2850 initial lumen, 2680 mean lumen).
And a brand called the Octron Eco family, also only in T8 (T8, 48", 32W, CRI 85, 3000 initial lumen, 2850 mean lumen). This one is available in a wider variety of Ks : 2700, 3000, 3500, 4100, 5000 and 6500 (this one gives out 2850 initial lumen and 2708 mean lumen). I think the Eco is better than the Supersaver Eco...
Now, for the T12. It's hard to compare T8 with T12 as they don't come in the same W and CRI... The closest T12 is one that gives 34W and 80 CRI (2900 initial lumen and 2640 mean lumen). They have the 40W (in T8, 32W seems to be the highest wattage available) that gives 3300 initial lumen and 3000 mean lumen. Comes only in 3000K, 3500K, 4100K.
It seems to me that T12 gives higher initial lumen but a lower mean lumen than T8. Am I right in thinking that I should look at mean lumen in comparing bulbs, making it T8 a better bulb?