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# MATERIALS OF DECORATION --- ## Incandescent Lamps: - **ER Bulb**: It is an ellipsoidal reflector bulb, having a precisely turned internal reflector that collects light and reflects it into a dispersed pattern at some distance in front of the lamp - **A R63 Bulb**: has a hemispherical silver bowl...

# MATERIALS OF DECORATION --- ## Incandescent Lamps: - **ER Bulb**: It is an ellipsoidal reflector bulb, having a precisely turned internal reflector that collects light and reflects it into a dispersed pattern at some distance in front of the lamp - **A R63 Bulb**: has a hemispherical silver bowl opposite the lamp base to increase the light source. - **G Bulb**: is a globe-shaped bulb for incandescent lamps, having a low brightness for exposed use. - **PS Bulb**: is an A bulb having a hemispherical reflective silver bowl opposite the lamp base. - **S Bulb**: is a spiral-shaped bulb for large incandescent lamps. ## Advantages - It is cheaper - Instant start and restart - Simple and compact installation - It can be fused - Simple accessories - Its life is independent of the number of starts - It has good color ## Disadvantages - Low-luminous efficacy - Has shorter life - Sensitive and critical to voltage and frequency - Poor maintenance cost - High maintenance cost - Produces more heat than light ## Applications - Due to its poor energy characteristics, Incandescent lamps are limited to infrequent or short-duration usage. - Where low cost is required - In focusing fixtures ## Tungsten-Halogen - It is a halogen lamp in which the gas-filled incandescent lamps, uses a halogen gas (bromine or iodine) under high-temperature conditions. - When a halogen-filled lamp operates at very high temperatures, it can pose a fire and burn hazards, and it is also possible to get a sunburn from UV emitted by the lamp.