You know BOTH of these are 115s. both have 2 humps on the back for the 2 bolt slipfitter. plus the refractor doors.

Yes both of them are 115s...the AE 113 has a flatter door (although a 115 door will FIT a 113 fixture as a replacement) and the AE 113 has 4 bolts instead of 2....

BTW are these different generations? the refractor doors BOTH say 115, but they are both different.

Errors Corrected until proven otherwise....and Ian the one on the Left actually has a Cooper Lense on it.

I know the refractor is different, I just noticed the design on the refractor door are diff.

the One on the Right is a More Recent Install....the one on the Left is Older.

Can tell by the left has a yellowed refractor.

Funny the newer one is MV while the older is HPS xD

That is Perculiar indeed...its like that sometimes....you'll have a Block that has older MV Nemas and a little further down they will have a Short Row of Newer High Pressure Sodium Cobraheads...or youll have some older MV Nemas with the Row Being interrupted by a Newer MV AE 115 Like this...AE's are generally being replaced by GE's as the most popular replacement canidates here...ocassionally a New Looking 115 will appear...its all about the M250R2's now.

But remember having a yellowed refractor doesn't always mean older or cleaner refractor is newer....because many times (esp in my electrical company) they replace refractors regularly for the best lighting performance....sometimes refractors get dirty or worn...and it's easier and faster to replace the refractor itself. I mean everyday I find OV-15 with clean new refractors! silverliners

The AE 113 does not have the step design, instead it has a plate with 4 screws and I believe springs. The tilting for 113 is adjusted by the 4 screws. normally linemen installing a AE 113 would just screw all the bolts evenly....so it would make sense that you would not find tilted fixtures as often for 113.

Low Wattage AE's typically have Plastic Drop Lenses...although some in my Area have Glass Lenses after the original plastic ones were busted...its diffrent with diffrent utilities...ive never seen a plastic lense on a high wattage fixture...except a Few Floodlights...most utilities in my Area use Plastic for Low and Glass for High...

Here we basically only use glass lens, there are a few plastic lens but very few. BTW the AEL plastic lens was also used by Powerlite, I think they may of taken the design.

the One on the Left actually has a Cooper Plastic Lense.

I know, I was referring to the one on the right