Illinois has put a date on the calendar that quietly reaches every business with an internally lit cabinet or pylon sign. On January 1, 2027, the state stops the sale of new linear fluorescent tubes, the long lamps behind the face of most lighted sign cabinets built before roughly 2015. Your sign does not become illegal that morning. What changes is what happens the next time a lamp burns out.
The short version
HB 2363 was approved by the Governor on August 9, 2024, became Public Act 103-0799, and took effect January 1, 2025. Everyone calls it the Clean Lighting Act, the bill’s short description, but as enacted it amends the Illinois Environmental Protection Act by adding Section 21.8, “Fluorescent lamp bans.” The findings there are about mercury, which every fluorescent lamp contains.
The wording matters more than the nickname. No person shall “sell, offer to sell, or distribute in the State as a new manufactured product” the covered lamps. Those are verbs about commerce, and nothing in the section tells a building owner to take anything down. Illinois was roughly the tenth state to pass a rule like this, per the Appliance Standards Awareness Project. There is no federal ban on linear fluorescent tubes.
| Date | What changes in Illinois | What it means for a lighted sign |
|---|---|---|
| August 9, 2024 | HB 2363 approved as Public Act 103-0799 | The rule goes on the books |
| January 1, 2025 | Public Act 103-0799 takes effect | No change yet for sign lamps |
| January 1, 2026 | Sale of screw-base and bayonet-base CFLs ends | Affects screw-in CFLs, still found in older awning and gooseneck fixtures |
| January 1, 2027 | Sale of pin-base CFLs and linear fluorescent lamps ends | This is the sign cabinet date |
| January 1, 2028 | The narrow allowance for lamps with no LED alternative closes | Not worth planning around, since LED sign tubes already sell |
Open the face of an internally lit sign and you see one of two things: long white tubes in spring loaded sockets, or rows of small LED modules. The first is the sign this law reaches, which makes it mostly a cabinet and pylon story.
Your sign is probably fluorescent if:
This is probably not your sign if it has already been converted to LED, it is an LED message center, it is modern channel letters, or it is neon. Section 21.8 covers compact fluorescent and linear fluorescent lamps, tubes with base end caps and a fluorescent coating, and it does not mention neon or cold cathode signs at all. If neon is what you have, the questions worth asking are about tubing and transformers, which we cover in our guide to neon sign repair.
One nuance, because it gets repeated badly online. The definition covers T8 and T12 diameters, end caps including recessed double contact, which is the base on high output sign lamps, and lengths from 0.5 to 8.0 feet. Very long sign lamps, such as 108 and 120 inch tubes, sit outside that range on a plain reading. That is a gap in a definition, not a plan, and there is no exemption for sign lamps.
Today a dark band across a cabinet face is a relamp. A technician opens the face, swaps the lamps, checks the sockets and ballast, and closes it up. That is ordinary lighted sign repair we run every week.
After January 1, 2027 the same call gets harder, because the matching tube is no longer sold in Illinois as a new manufactured product. High output T12 lamps were already growing scarce as federal efficiency standards thinned out production. Expect a partly dark face, mismatched color from whatever stock turns up, and repeat visits to a cabinet that keeps losing sections.
None of that is a legal problem. It is a curb appeal and maintenance budget problem.
A fluorescent cabinet does not have to become a new sign. Usually the cabinet, poles, and faces are fine and only the lighting inside is dated. Here are the three paths the industry uses.
| Approach | What actually changes | Best when |
|---|---|---|
| LED tubes into the existing cabinet | Fluorescent lamps out, LED tubes sized for the cabinet in, wiring simplified so the LEDs run on line voltage instead of the old sign ballast | Cabinet, faces, and structure are sound and you want the shortest path off fluorescent |
| Full LED rebuild inside the cabinet | Lamps, sockets, and ballasts all come out, and LED lighting is laid out and powered for the specific face | You want the most even lighting and the longest stretch between service calls |
| New cabinet or a new sign | Cabinet, faces, and sometimes the structure are replaced | The cabinet is corroded, the faces are faded or cracked, or branding is changing anyway |
If replacement is on the table, our breakdown of what a business sign costs explains the pieces that move the number.
The same logic applies to the rest of the property, which is why a lighting visit often turns into parking lot light repair while the truck is on the lot.
Ameren Illinois runs business lighting incentive programs, and some lighting retrofits may qualify. Illuminated sign cabinets are not one of the standard listed measures, so this is worth asking about rather than assuming. Sequence matters: these programs generally want to hear from you before the work happens, not after the invoice. Ask us to check with an Energy Advisor while we are quoting.
A technician opens the cabinet and identifies what is in there: lamp type and length, socket condition, ballast count and age, wiring, and the state of the faces and gaskets. That inspection separates a real quote from a guess, because two cabinets that look identical from the road can be built differently inside. From there you get the options above priced side by side, and a straightforward single cabinet conversion is normally one crew visit. Ask how the removed lamps will be handled, too: spent fluorescent lamps from a business are mercury bearing and fall under the Illinois universal waste rules rather than the dumpster.
Signature Signs and Lighting has serviced lighted cabinets, pylons, and monuments across Central Illinois for decades, including every sign New Era Signs of Decatur installed, since New Era is now part of our team. Our LED sign lighting crew can tell you where your sign stands.
Send a photo or let us open the cabinet on site. We will tell you what is lighting your sign today and what an LED conversion would involve.
(217) 860-0708Prefer to type? Request a quote and an estimator will follow up.
This explains a state law in plain language for sign owners and is not legal advice. The controlling text is 415 ILCS 5/21.8, added by Public Act 103-0799. Read the statute at ilga.gov and talk to your attorney if you need a formal answer.
Sources: Public Act 103-0799 and 415 ILCS 5/21.8, Illinois General Assembly; energy figures, Appliance Standards Awareness Project. Verified September 21, 2026.
