Doctors, dentists, and opticians often use various signage to attract attention and indicate their presence. Custom Neon Lights are a popular choice due to their vibrant colors, visibility, and nostalgic appeal. While I can't provide real-time information on specific signage available for purchase, I can offer some general ideas for doctors, dentists, and opticians LED neon signs that you might consider:

1. Caduceus Symbol: The caduceus, a symbol featuring a staff with two entwined snakes and wings at the top, is commonly associated with the medical profession. A neon sign featuring this symbol can represent a doctor's office or medical facility.

2. Tooth Icon: For dentists, a neon sign featuring a tooth icon can be eye-catching and instantly convey the nature of the business. It could be a stylized representation of a tooth or a more playful design.

3. Eye Symbol: Opticians can consider a neon sign featuring an eye symbol or an abstract representation of an eye. This can emphasize the focus on vision and eye care services.

4. Clinic/Office Name: Another option is to create a custom neon sign displaying the name of the clinic or office. This helps to establish brand identity and make the signage unique to your practice.

5. Open/Closed Signs: LED neon signs can also be used for practical purposes like indicating whether the office is open or closed. A simple sign displaying "Open" or "Closed" in a neon design can be placed on the entrance or storefront.

Remember that when considering Doctors Dentists Opticians Led Neon, it's essential to comply with local regulations and obtain any necessary permits. Additionally, working with a professional sign maker or neon sign manufacturer can ensure you get a high-quality and durable product.