LEGO produces bricks in at least two different transparent orange shades: the current "Transparent Bright Orange" and the retired "Transparent Fluorescent Reddish Orange" (known as Trans-Neon Orange by fans).
Color Details
Transparent Bright Orange - Trans-Orange 182 - Current - Used for flames, energy effects, cockpit windows, etc.
Transparent Fluorescent Reddish Orange - Trans-Neon Orange - 47 - Discontinued (as of 2022) - Prominently featured in classic themes like Ice Planet 2002.
Availability
Both colors were primarily produced using a polycarbonate plastic for durability, although production shifted to MABS plastic around 2017.
Current Production (Transparent Bright Orange): This color is widely available and can be purchased from the official LEGO "Pick a Brick" service or in current sets.
Discontinued Production (Transparent Fluorescent Reddish Orange): This color is no longer manufactured. Parts in this specific shade must be purchased from third-party re-sellers and marketplaces like BrickLink or eBay.