SATCO Lighting S49390 18W LED HID Replacement, 80 CRI, 5000K, Type B, Ballast Bypass, Medium Base, Economy Hi-Pro

No. The S49390 is a Type B ballast bypass lamp, so the existing HID ballast has to be removed and the medium base socket wired directly to line voltage. Drop it into a fixture with the ballast still in the circuit and it won't work. Budget for the rewire on every fixture you convert, or plan on new fixtures.

Type A runs on the existing HID ballast, so it's a lamp-only swap but you keep the ballast and its failure rate and its losses. Type B, which is what the S49390 is, bypasses the ballast entirely and runs on line voltage, so it takes an electrician and a rewire per fixture but removes the ballast from the system for good. On a large retrofit, Type B is the choice when you don't want to be back in the same fixture when the ballast dies.

Yes, for the fixture conversion. Because it's a ballast bypass lamp, someone has to open the fixture, disconnect and remove the HID ballast, and rewire the medium base socket to line voltage. That's licensed electrical work in most jurisdictions. Once the fixture is converted, future lamp changes are just a screw-in.

It uses a medium base, the standard screw socket found on most commercial fixtures, so it threads into the same socket a metal halide or HPS lamp came out of. The socket itself still has to be rewired for line voltage because this is a ballast bypass lamp.

5000K is a cool, daylight-white light, the neutral bright tone most people pick for warehouses, parking structures, and shop areas. It reads noticeably whiter and bluer than a 3000K or 4000K lamp, so if the rest of the building is on warmer lamps, this one will stand out. Match the Kelvin number across a space, not just the wattage.

80 CRI is the standard for general commercial and industrial spaces, and it's fine for warehouses, back-of-house, corridors, parking, and most MRO work. Where color judgment matters (paint matching, fabric, produce, retail merchandising), specify a 90+ CRI lamp instead. The S49390 is an 80 CRI lamp.

The S49390 draws 18 watts and is built as an HID replacement, so the wattage number isn't comparable to what came out of the fixture. LED replacements pull a fraction of the input watts of the metal halide or HPS lamp they take the place of. Compare on the light output you need for the mounting height and space, not on watts against watts.

Order Satco S49390. That's the single orderable configuration of this Economy Hi-Pro 18 watt, 5000K, 80 CRI, Type B ballast bypass, medium base lamp, and it comes in white.