This invention relates to a process to polymerize olefins comprising contacting a catalyst or catalyst system with olefin in the presence of a fluorocarbon at a temperature above the onset melting point of the polymer. The zoom lens has a first lens group with positive refractive power, a second lens group with negative refractive power, a third lens group with positive refractive power, a fourth lens group with positive refractive power, and a fifth lens group including a negative subgroup with negative refractive power and a positive subgroup and with positive refractive power. The mounting brackets may be mounted at any distance apart, and thus may accommodate awnings of different sizes. Thus, a decrease in extraction efficiency for light emitted from a light-emitting element can be suppressed, and a rise in the temperature of the light-emitting element in response to the light emission can be suppressed. This time savings has advantages in treatment verification.