An illumination system is provided, which includes a first solid-state light source, a second solid-state light source, a third solid-state light source, a light combining element, a light homogenizing element, a first plate and a first band-stop filter. The apparatus can be a tubular flow reactor comprising a first portion of the reactor defining a gas entry zone, a second portion of the reactor defining a reaction zone and a third portion of the reactor defining a separation zone, the reaction zone providing a reactant contacting region. The holes formed through the sponson thus allow for fine tuning and adjusting the performance characteristics and handling characteristics of the personal watercraft long after the point of manufacture. A pawl is mounted in the compartment and includes a toothed side facing the gear wheel teeth. The two signals are transmitted to receiver, which decodes the phases and relative amplitudes to obtain the codes, and reproduces the data from the obtained codes.