| En Name: | Svetly |
| Ru Name: | Светлый |
| Loc Name1: | Сибиэтлэй |
| Loc Lang1: | Yakut |
| Coordinates: | 63.05°N 140°W |
| Map Label Position: | right |
| Federal Subject: | Sakha Republic |
| Adm District Jur: | Mirninsky District |
| Adm Selsoviet Jur: | Svetly |
| Adm Selsoviet Type: | Settlement |
| Adm Ctr Of: | Settlement of Svetly |
| Inhabloc Cat: | Urban-type settlement |
| Inhabloc Type: | Urban-type settlement |
| Mun District Jur: | Mirninsky Municipal District |
| Mun District Jur Ref: | [1] |
| Urban Settlement Jur: | Svetly Urban Settlement |
| Mun Admctr Of: | Svetly Urban Settlement |
| Pop 2010Census: | 3137 |
| Established Date: | 1970s |
| Current Cat Date: | 1984 |
| Postal Codes: | 678196 |
| Bodystyle: | width:23.5em; |
| Svetly population | |
| Label1: | 2010 Census |
| Data1: | 3,137 |
| Label2: | 2002 Census |
| Data2: | 3,546 |
| Label3: | 1989 Census |
| Data3: | 4,550 |
Svetly (Russian: Све́тлый, lit light, clear; Yakut: Сибиэтлэй, Sibietley) is an urban locality (an urban-type settlement) in Mirninsky District of the Sakha Republic, Russia, located 75km (47miles) from Mirny, the administrative center of the district,[2] on the southern edge of the Vilyuy Plateau (a part of the Central Siberian Plateau), not far from the right bank of the Vilyuy River. As of the 2010 Census, its population was 3,137.
It was founded in the late 1970s as a works base for construction of a dam and hydroelectric plant, downstream of the larger Vilyuy Dam. With the economic difficulties in the Soviet Union during the 1980s and in Russia during the 1990s, completion of the project was greatly delayed with the hydroelectric plant only beginning power generation between 2004 and 2008, with three of the four planned turbines in operation.
Urban-type settlement status was granted to Svetly in 1984.[3]
Within the framework of administrative divisions, the urban-type settlement of Svetly[4] is incorporated within Mirninsky District as the Settlement of Svetly. As a municipal division, the Settlement of Svetly is incorporated within Mirninsky Municipal District as Svetly Urban Settlement.[5]
Vilyuyskaya GES-3 hydroelectric plant, with a capacity of 270 MW, is the principal employer. The power plant is managed by a daughter company of diamond mining corporation ALROSA. Many of the settlement's inhabitants also commute for week-by-week shift work in remote diamond mines or in construction projects throughout the western region of the Sakha Republic, including the Eastern Siberia–Pacific Ocean oil pipeline.
Svetly is connected by a 33km (21miles) road with the Anabar Highway between Mirny and Chernyshevsky. The Evenk village of Syuldyukar lies 25km (16miles) downstream along the Vilyuy and can be reached by boat in summer or via winter roads when the river is frozen.