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gsxr, I hope you get your fixtures installed, and end up ecstatic with the light output you obtain!!!! With that said, I WORK for Hubbell Lighting... I've never heard of esi.. As 2many said, not that it matters.... But it ain't so. 2many, 3 lamps (per cross section) is very common in tandem (as...

mx842, If you can find the manufacturer name, you could likely get some acrylic or glass refractors, to replace the spun aluminum reflectors on them now.. You'd help to eliminate shadows and dark areas..

CSI, I am not referring to LED Lamps.. I am referring to a driven LED chip, mounted to a board, being driven by a low voltage transformer driver assemby, at MILLIAMPS of current. Name Brand drivers have been tested well beyond the 100k hour mark.. Hence, Hubbell Lighting, warrantying ALL of...

One more thing to consider, especially if your roof is insulated: a 400w Hi Bay generates temperatures about 60 degrees higher than ambient.. Your insulated roof will be a blessing and a curse in that situation.. If it's 120* up at your roof, that fixture will produce heat approaching 180*. That...

You could buy 6 lamp T5 HO- F bays for 130-140 each with lamps included.. As 2 many said above, that fixture (whether with a spun aluminum reflector OR a polycarbonate or glass refractor) is designed around the pattern of a high wattage HID lamp.. People adding the fluorescent lamps, removes...

2 many, I'm not here to get into one of your proverbial ******* matches. Advance mark 10 dimming ballasts are about a 40-50 $ adder to the cost of a fixture. 5% flicker free is a standard on commercial and school projects. Just because you've not witnessed it, certainly you won't deny it. I've...

Actually, current technology LEDs have been tested out to the 100,000 hour mark. Hence the LM70, LM80, LM90 ratings we have available at this very moment. It denotes the Lumen Maintenance (existing level of lumen output) at that point in life. The total life (to end) has not been significantly...

east, ANY chance the generator is a 120/240 Hi-Leg ?? I've dealt with that power system a few times in the past.. I just don't know if anyone ever produced generators with that configuration.. If it is, I believe that's certainly workable.. But again, I don't know if that's even a possibility..

Who's advertising their business? I've offered lighting layout and design to multiple people on this forum. Without any suggestion of charging a dime. With the majority of my projects being $ 500k plus, I can assure you that on the highly unlikely possibility of me ever facilitating a purchase...

And why you would suggest against using 8' tandems, is beyond me.. an 8' tandem would be considerably less expensive than 2- 4' fixtures. Even if he went with dual ballast 8' fixtures, he could switch them independently, and have in effect "dual level" switching, to reduce light output for...

2 many, I take contention with your "NO fluorescent lamp is dimmable" comment above... Using Advance Mark 10 Powerline dimming ballasts, you have FULL DIMMING CAPABILITY, using LINE VOLTAGE DIMMERS (less than $10 each), from 5%-100% full range, flicker free. Just as I said in my other post...

I stayed at Holiday Inn last night.. Does that count ?

they're tandem T8 strips.. use 4- 32w Fluorescent lamps.. You'd probably pay 30-40 $ each for new fixtures.. So yeah, they're probably "worth it"..

TK, I've posted several times in my few responses, that I am in fact in the lighting industry.. That's no secret.. As I said, if you're happy with them, great !! I know that not everyone goes for the Cadillac of any endeavor.. In a work shop, hobby shop, garage, etc., the high kelvin temp...

it's a standard T8 instant start electronic ballast... As far as T8s go, yeah, they're efficient..

TK, I'm glad you're happy with the fixtures you purchased... BUT.. Those fixtures **** in every measurable category.. "super efficient 87 lumens per watt" - that's not very efficient at all.. The Columbia (as well as other brands) are upwards of 108 LPW.. 5700k color temp- that is SO bright...

jethrob, I was mistakenly thinking that Vonhef had started the topic... If you already bought the fixtures, I am certain you'll be happy with your purchase.. Give me your ceiling height, wall and ceiling colors & material.

If you're interested, I could do a layout of your shop, and show you point by point, the actual footcandle levels at various workplane heights, using the fixtures.. Honestly, if I recall your dimensions correctly from earlier in the post, you won't need ANYWHERE NEAR as many fixtures as you'd...

Any electrical wholesale supply house can hook you up.. I see you're in Southern, Oklahoma.. Where exactly ?? My sales territory includes Paris, TX. If you could make a trip there, I could get one of my distributors to fix you up. I can work up a project quote, and give you pricing, then just...

One thing to consider, when discussing lumen output, and available light in a space.. Fluorescent lamp lumens are calculated/measured in a mirrored environment, with 100% reflectance. The 3100 lumens that someone above claims their fluorescents are putting out, is initial lamp lumens. NOT...